diff --git a/src/common/cfgfiles.c b/src/common/cfgfiles.c
index 081137b8..111234e9 100644
--- a/src/common/cfgfiles.c
+++ b/src/common/cfgfiles.c
@@ -84,11 +84,11 @@ list_load_from_data (GSList ** list, char *ibuf, int size)
 	{
 		if (*buf != '#')
 		{
-			if (!strncasecmp (buf, "NAME ", 5))
+			if (!g_ascii_strncasecmp (buf, "NAME ", 5))
 			{
 				safe_strcpy (name, buf + 5, sizeof (name));
 			}
-			else if (!strncasecmp (buf, "CMD ", 4))
+			else if (!g_ascii_strncasecmp (buf, "CMD ", 4))
 			{
 				safe_strcpy (cmd, buf + 4, sizeof (cmd));
 				if (*name)
@@ -154,7 +154,7 @@ list_delentry (GSList ** list, char *name)
 	while (alist)
 	{
 		pop = (struct popup *) alist->data;
-		if (!strcasecmp (name, pop->name))
+		if (!g_ascii_strcasecmp (name, pop->name))
 		{
 			*list = g_slist_remove (*list, pop);
 			free (pop);
@@ -174,7 +174,7 @@ cfg_get_str (char *cfg, char *var, char *dest, int dest_len)
 
 	while (1)
 	{
-		if (!strncasecmp (buffer, cfg, strlen (var) + 1))
+		if (!g_ascii_strncasecmp (buffer, cfg, strlen (var) + 1))
 		{
 			char *value, t;
 			cfg += strlen (var);
@@ -1000,7 +1000,7 @@ cfg_get_bool (char *var)
 
 	do
 	{
-		if (!strcasecmp (var, vars[i].name))
+		if (!g_ascii_strcasecmp (var, vars[i].name))
 		{
 			return *((int *) &prefs + vars[i].offset);
 		}
@@ -1023,27 +1023,27 @@ cmd_set (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 	int idx = 2;
 	char *var, *val;
 
-	if (strcasecmp (word[2], "-e") == 0)
+	if (g_ascii_strcasecmp (word[2], "-e") == 0)
 	{
 		idx++;
 		erase = TRUE;
 	}
 
 	/* turn a bit OFF */
-	if (strcasecmp (word[idx], "-off") == 0)
+	if (g_ascii_strcasecmp (word[idx], "-off") == 0)
 	{
 		idx++;
 		off = TRUE;
 	}
 
 	/* turn a bit ON */
-	if (strcasecmp (word[idx], "-or") == 0 || strcasecmp (word[idx], "-on") == 0)
+	if (g_ascii_strcasecmp (word[idx], "-or") == 0 || g_ascii_strcasecmp (word[idx], "-on") == 0)
 	{
 		idx++;
 		or = TRUE;
 	}
 
-	if (strcasecmp (word[idx], "-quiet") == 0)
+	if (g_ascii_strcasecmp (word[idx], "-quiet") == 0)
 	{
 		idx++;
 		quiet = TRUE;
@@ -1069,7 +1069,7 @@ cmd_set (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 		if (wild)
 			found = !match (var, vars[i].name);
 		else
-			found = strcasecmp (var, vars[i].name);
+			found = g_ascii_strcasecmp (var, vars[i].name);
 
 		if (found == 0)
 		{
@@ -1098,9 +1098,9 @@ cmd_set (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 							*((int *) &prefs + vars[i].offset) = 1;
 						else
 							*((int *) &prefs + vars[i].offset) = 0;
-						if (!strcasecmp (val, "YES") || !strcasecmp (val, "ON"))
+						if (!g_ascii_strcasecmp (val, "YES") || !g_ascii_strcasecmp (val, "ON"))
 							*((int *) &prefs + vars[i].offset) = 1;
-						if (!strcasecmp (val, "NO") || !strcasecmp (val, "OFF"))
+						if (!g_ascii_strcasecmp (val, "NO") || !g_ascii_strcasecmp (val, "OFF"))
 							*((int *) &prefs + vars[i].offset) = 0;
 					} else
 					{
diff --git a/src/common/chanopt.c b/src/common/chanopt.c
index f8e16e8b..198ebe6c 100644
--- a/src/common/chanopt.c
+++ b/src/common/chanopt.c
@@ -84,9 +84,9 @@ chanopt_command (session *sess, char *tbuf, char *word[], char *word_eol[])
 
 	if (word[offset][0])
 	{
-		if (!strcasecmp (word[offset], "ON"))
+		if (!g_ascii_strcasecmp (word[offset], "ON"))
 			newval = 1;
-		else if (!strcasecmp (word[offset], "OFF"))
+		else if (!g_ascii_strcasecmp (word[offset], "OFF"))
 			newval = 0;
 		else if (word[offset][0] == 'u')
 			newval = SET_DEFAULT;
@@ -186,8 +186,8 @@ chanopt_find (char *network, char *channel, gboolean add_new)
 	for (list = chanopt_list; list; list = list->next)
 	{
 		co = list->data;
-		if (!strcasecmp (co->channel, channel) &&
-			 !strcasecmp (co->network, network))
+		if (!g_ascii_strcasecmp (co->channel, channel) &&
+			 !g_ascii_strcasecmp (co->network, network))
 			return co;
 	}
 
diff --git a/src/common/ctcp.c b/src/common/ctcp.c
index 2bb75746..36952db7 100644
--- a/src/common/ctcp.c
+++ b/src/common/ctcp.c
@@ -73,7 +73,7 @@ ctcp_check (session *sess, char *nick, char *word[], char *word_eol[],
 	while (list)
 	{
 		pop = (struct popup *) list->data;
-		if (!strcasecmp (ctcp, pop->name))
+		if (!g_ascii_strcasecmp (ctcp, pop->name))
 		{
 			ctcp_reply (sess, nick, word, word_eol, pop->cmd);
 			ret = 1;
@@ -97,7 +97,7 @@ ctcp_handle (session *sess, char *to, char *nick, char *ip,
 			ctcp_offset = 3;
 
 	/* consider DCC to be different from other CTCPs */
-	if (!strncasecmp (msg, "DCC", 3))
+	if (!g_ascii_strncasecmp (msg, "DCC", 3))
 	{
 		/* but still let CTCP replies override it */
 		if (!ctcp_check (sess, nick, word, word_eol, word[4] + ctcp_offset))
@@ -110,7 +110,7 @@ ctcp_handle (session *sess, char *to, char *nick, char *ip,
 
 	/* consider ACTION to be different from other CTCPs. Check
       ignore as if it was a PRIV/CHAN. */
-	if (!strncasecmp (msg, "ACTION ", 7))
+	if (!g_ascii_strncasecmp (msg, "ACTION ", 7))
 	{
 		if (is_channel (serv, to))
 		{
@@ -135,7 +135,7 @@ ctcp_handle (session *sess, char *to, char *nick, char *ip,
 	if (ignore_check (word[1], IG_CTCP))
 		return;
 
-	if (!strcasecmp (msg, "VERSION") && !prefs.hidever)
+	if (!g_ascii_strcasecmp (msg, "VERSION") && !prefs.hidever)
 	{
 #ifdef WIN32
 		snprintf (outbuf, sizeof (outbuf), "VERSION XChat-WDK "PACKAGE_VERSION" [x%d] / %s",
@@ -149,7 +149,7 @@ ctcp_handle (session *sess, char *to, char *nick, char *ip,
 
 	if (!ctcp_check (sess, nick, word, word_eol, word[4] + ctcp_offset))
 	{
-		if (!strncasecmp (msg, "SOUND", 5))
+		if (!g_ascii_strncasecmp (msg, "SOUND", 5))
 		{
 			po = strchr (word[5], '\001');
 			if (po)
diff --git a/src/common/dcc.c b/src/common/dcc.c
index d91b7e8e..4c8724d9 100644
--- a/src/common/dcc.c
+++ b/src/common/dcc.c
@@ -572,7 +572,7 @@ dcc_chat_line (struct DCC *dcc, char *line)
 
 	url_check_line (line, len);
 
-	if (line[0] == 1 && !strncasecmp (line + 1, "ACTION", 6))
+	if (line[0] == 1 && !g_ascii_strncasecmp (line + 1, "ACTION", 6))
 	{
 		po = strchr (line + 8, '\001');
 		if (po)
@@ -1940,9 +1940,9 @@ find_dcc (char *nick, char *file, int type)
 			{
 				if (!file[0])
 					return dcc;
-				if (!strcasecmp (file, file_part (dcc->file)))
+				if (!g_ascii_strcasecmp (file, file_part (dcc->file)))
 					return dcc;
-				if (!strcasecmp (file, dcc->file))
+				if (!g_ascii_strcasecmp (file, dcc->file))
 					return dcc;
 			}
 		}
@@ -2406,7 +2406,7 @@ handle_dcc (struct session *sess, char *nick, char *word[],
 	DCC_SIZE size;
 	int psend = 0;
 
-	if (!strcasecmp (type, "CHAT"))
+	if (!g_ascii_strcasecmp (type, "CHAT"))
 	{
 		port = atoi (word[8]);
 		addr = strtoul (word[7], NULL, 10);
@@ -2453,7 +2453,7 @@ handle_dcc (struct session *sess, char *nick, char *word[],
 		return;
 	}
 
-	if (!strcasecmp (type, "Resume"))
+	if (!g_ascii_strcasecmp (type, "Resume"))
 	{
 		port = atoi (word[7]);
 
@@ -2497,7 +2497,7 @@ handle_dcc (struct session *sess, char *nick, char *word[],
 		}
 		return;
 	}
-	if (!strcasecmp (type, "Accept"))
+	if (!g_ascii_strcasecmp (type, "Accept"))
 	{
 		port = atoi (word[7]);
 		dcc = find_dcc_from_port (port, TYPE_RECV);
@@ -2507,7 +2507,7 @@ handle_dcc (struct session *sess, char *nick, char *word[],
 		}
 		return;
 	}
-	if (!strcasecmp (type, "SEND"))
+	if (!g_ascii_strcasecmp (type, "SEND"))
 	{
 		char *file = file_part (word[6]);
 
diff --git a/src/common/inbound.c b/src/common/inbound.c
index 1c124db4..89899655 100644
--- a/src/common/inbound.c
+++ b/src/common/inbound.c
@@ -886,7 +886,7 @@ inbound_notice (server *serv, char *to, char *nick, char *msg, char *ip, int id)
 			if (msg[0] == '[' && (!serv->have_idmsg || id))
 			{
 				/* guess where chanserv meant to post this -sigh- */
-				if (!strcasecmp (nick, "ChanServ") && !find_dialog (serv, nick))
+				if (!g_ascii_strcasecmp (nick, "ChanServ") && !find_dialog (serv, nick))
 				{
 					char *dest = strdup (msg + 1);
 					char *end = strchr (dest, ']');
diff --git a/src/common/modes.c b/src/common/modes.c
index 1acf7f54..6eb63f3b 100644
--- a/src/common/modes.c
+++ b/src/common/modes.c
@@ -789,20 +789,20 @@ inbound_005 (server * serv, char *word[])
 			}
 
 			/* use /NICKSERV */
-			if (strcasecmp (word[w] + 8, "RusNet") == 0)
+			if (g_ascii_strcasecmp (word[w] + 8, "RusNet") == 0)
 				serv->nickservtype = 1;
-			else if (strcasecmp (word[w] + 8, "UniBG") == 0)
+			else if (g_ascii_strcasecmp (word[w] + 8, "UniBG") == 0)
 				serv->nickservtype = 3;
-			else if (strcasecmp (word[w] + 8, "QuakeNet") == 0)
+			else if (g_ascii_strcasecmp (word[w] + 8, "QuakeNet") == 0)
 				serv->nickservtype = 4;
 
 		} else if (strncmp (word[w], "CASEMAPPING=", 12) == 0)
 		{
 			if (strcmp (word[w] + 12, "ascii") == 0)	/* bahamut */
-				serv->p_cmp = (void *)strcasecmp;
+				serv->p_cmp = (void *)g_ascii_strcasecmp;
 		} else if (strncmp (word[w], "CHARSET=", 8) == 0)
 		{
-			if (strcasecmp (word[w] + 8, "UTF-8") == 0)
+			if (g_ascii_strcasecmp (word[w] + 8, "UTF-8") == 0)
 			{
 				server_set_encoding (serv, "UTF-8");
 			}
diff --git a/src/common/outbound.c b/src/common/outbound.c
index b13a33a1..872ef50b 100644
--- a/src/common/outbound.c
+++ b/src/common/outbound.c
@@ -617,13 +617,13 @@ cmd_clear (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 	GSList *list = sess_list;
 	char *reason = word_eol[2];
 
-	if (strcasecmp (reason, "HISTORY") == 0)
+	if (g_ascii_strcasecmp (reason, "HISTORY") == 0)
 	{
 		history_free (&sess->history);
 		return TRUE;
 	}
 
-	if (strncasecmp (reason, "all", 3) == 0)
+	if (g_ascii_strncasecmp (reason, "all", 3) == 0)
 	{
 		while (list)
 		{
@@ -750,26 +750,26 @@ cmd_dcc (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 	char *type = word[2];
 	if (*type)
 	{
-		if (!strcasecmp (type, "HELP"))
+		if (!g_ascii_strcasecmp (type, "HELP"))
 			return FALSE;
-		if (!strcasecmp (type, "CLOSE"))
+		if (!g_ascii_strcasecmp (type, "CLOSE"))
 		{
 			if (*word[3] && *word[4])
 			{
 				goodtype = 0;
-				if (!strcasecmp (word[3], "SEND"))
+				if (!g_ascii_strcasecmp (word[3], "SEND"))
 				{
 					dcc = find_dcc (word[4], word[5], TYPE_SEND);
 					dcc_abort (sess, dcc);
 					goodtype = TRUE;
 				}
-				if (!strcasecmp (word[3], "GET"))
+				if (!g_ascii_strcasecmp (word[3], "GET"))
 				{
 					dcc = find_dcc (word[4], word[5], TYPE_RECV);
 					dcc_abort (sess, dcc);
 					goodtype = TRUE;
 				}
-				if (!strcasecmp (word[3], "CHAT"))
+				if (!g_ascii_strcasecmp (word[3], "CHAT"))
 				{
 					dcc = find_dcc (word[4], "", TYPE_CHATRECV);
 					if (!dcc)
@@ -789,20 +789,20 @@ cmd_dcc (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 			}
 			return FALSE;
 		}
-		if ((!strcasecmp (type, "CHAT")) || (!strcasecmp (type, "PCHAT")))
+		if ((!g_ascii_strcasecmp (type, "CHAT")) || (!g_ascii_strcasecmp (type, "PCHAT")))
 		{
 			char *nick = word[3];
-			int passive = (!strcasecmp(type, "PCHAT")) ? 1 : 0;
+			int passive = (!g_ascii_strcasecmp(type, "PCHAT")) ? 1 : 0;
 			if (*nick)
 				dcc_chat (sess, nick, passive);
 			return TRUE;
 		}
-		if (!strcasecmp (type, "LIST"))
+		if (!g_ascii_strcasecmp (type, "LIST"))
 		{
 			dcc_show_list (sess);
 			return TRUE;
 		}
-		if (!strcasecmp (type, "GET"))
+		if (!g_ascii_strcasecmp (type, "GET"))
 		{
 			char *nick = word[3];
 			char *file = word[4];
@@ -820,18 +820,18 @@ cmd_dcc (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 			}
 			return TRUE;
 		}
-		if ((!strcasecmp (type, "SEND")) || (!strcasecmp (type, "PSEND")))
+		if ((!g_ascii_strcasecmp (type, "SEND")) || (!g_ascii_strcasecmp (type, "PSEND")))
 		{
 			int i = 3, maxcps;
 			char *nick, *file;
-			int passive = (!strcasecmp(type, "PSEND")) ? 1 : 0;
+			int passive = (!g_ascii_strcasecmp(type, "PSEND")) ? 1 : 0;
 
 			nick = word[i];
 			if (!*nick)
 				return FALSE;
 
 			maxcps = prefs.dcc_max_send_cps;
-			if (!strncasecmp(nick, "-maxcps=", 8))
+			if (!g_ascii_strncasecmp(nick, "-maxcps=", 8))
 			{
 				maxcps = atoi(nick + 8);
 				i++;
@@ -1312,7 +1312,7 @@ cmd_menu (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 				*p = '/';
 	}
 
-	if (!strcasecmp (word[idx], "ADD"))
+	if (!g_ascii_strcasecmp (word[idx], "ADD"))
 	{
 		if (toggle)
 		{
@@ -1327,7 +1327,7 @@ cmd_menu (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 		return TRUE;
 	}
 
-	if (!strcasecmp (word[idx], "DEL"))
+	if (!g_ascii_strcasecmp (word[idx], "DEL"))
 	{
 		menu_del (tbuf, label);
 		return TRUE;
@@ -2045,7 +2045,7 @@ cmd_gui (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 	case 0xc0851aaa: fe_message (word[3], FE_MSG_INFO|FE_MSG_MARKUP); break; /* MSGBOX */
 	case 0x0035dafd: fe_ctrl_gui (sess, 1, 0); break; /* SHOW */
 	case 0x0033155f: /* MENU */
-		if (!strcasecmp (word[3], "TOGGLE"))
+		if (!g_ascii_strcasecmp (word[3], "TOGGLE"))
 			fe_ctrl_gui (sess, 6, 0);
 		else
 			return FALSE;
@@ -2247,25 +2247,25 @@ cmd_ignore (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 			}
 			return TRUE;
 		}
-		if (!strcasecmp (word[i], "UNIGNORE"))
+		if (!g_ascii_strcasecmp (word[i], "UNIGNORE"))
 			type |= IG_UNIG;
-		else if (!strcasecmp (word[i], "ALL"))
+		else if (!g_ascii_strcasecmp (word[i], "ALL"))
 			type |= IG_PRIV | IG_NOTI | IG_CHAN | IG_CTCP | IG_INVI | IG_DCC;
-		else if (!strcasecmp (word[i], "PRIV"))
+		else if (!g_ascii_strcasecmp (word[i], "PRIV"))
 			type |= IG_PRIV;
-		else if (!strcasecmp (word[i], "NOTI"))
+		else if (!g_ascii_strcasecmp (word[i], "NOTI"))
 			type |= IG_NOTI;
-		else if (!strcasecmp (word[i], "CHAN"))
+		else if (!g_ascii_strcasecmp (word[i], "CHAN"))
 			type |= IG_CHAN;
-		else if (!strcasecmp (word[i], "CTCP"))
+		else if (!g_ascii_strcasecmp (word[i], "CTCP"))
 			type |= IG_CTCP;
-		else if (!strcasecmp (word[i], "INVI"))
+		else if (!g_ascii_strcasecmp (word[i], "INVI"))
 			type |= IG_INVI;
-		else if (!strcasecmp (word[i], "QUIET"))
+		else if (!g_ascii_strcasecmp (word[i], "QUIET"))
 			quiet = 1;
-		else if (!strcasecmp (word[i], "NOSAVE"))
+		else if (!g_ascii_strcasecmp (word[i], "NOSAVE"))
 			type |= IG_NOSAVE;
-		else if (!strcasecmp (word[i], "DCC"))
+		else if (!g_ascii_strcasecmp (word[i], "DCC"))
 			type |= IG_DCC;
 		else
 		{
@@ -2456,12 +2456,12 @@ cmd_load (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 #ifdef USE_PLUGIN
 	len = strlen (word[2]);
 #ifdef WIN32
-	if (len > 4 && strcasecmp (".dll", word[2] + len - 4) == 0)
+	if (len > 4 && g_ascii_strcasecmp (".dll", word[2] + len - 4) == 0)
 #else
 #if defined(__hpux)
-	if (len > 3 && strcasecmp (".sl", word[2] + len - 3) == 0)
+	if (len > 3 && g_ascii_strcasecmp (".sl", word[2] + len - 3) == 0)
 #else
-	if (len > 3 && strcasecmp (".so", word[2] + len - 3) == 0)
+	if (len > 3 && g_ascii_strcasecmp (".so", word[2] + len - 3) == 0)
 #endif
 #endif
 	{
@@ -2613,8 +2613,8 @@ cmd_msg (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 			else
 			{
 				/* mask out passwords */
-				if (strcasecmp (nick, "nickserv") == 0 &&
-					 strncasecmp (msg, "identify ", 9) == 0)
+				if (g_ascii_strcasecmp (nick, "nickserv") == 0 &&
+					 g_ascii_strncasecmp (msg, "identify ", 9) == 0)
 					msg = "identify ****";
 				EMIT_SIGNAL (XP_TE_MSGSEND, sess, nick, msg, NULL, NULL, 0);
 			}
@@ -2825,7 +2825,7 @@ cmd_reconnect (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 
 	prefs.recon_delay = 0;
 
-	if (!strcasecmp (word[2], "ALL"))
+	if (!g_ascii_strcasecmp (word[2], "ALL"))
 	{
 		list = serv_list;
 		while (list)
@@ -2997,7 +2997,7 @@ parse_irc_url (char *url, char *server_name[], char *port[], char *channel[], in
 {
 	char *co;
 #ifdef USE_OPENSSL
-	if (strncasecmp ("ircs://", url, 7) == 0)
+	if (g_ascii_strncasecmp ("ircs://", url, 7) == 0)
 	{
 		*use_ssl = TRUE;
 		*server_name = url + 7;
@@ -3005,7 +3005,7 @@ parse_irc_url (char *url, char *server_name[], char *port[], char *channel[], in
 	}
 #endif
 
-	if (strncasecmp ("irc://", url, 6) == 0)
+	if (g_ascii_strncasecmp ("irc://", url, 6) == 0)
 	{
 		*server_name = url + 6;
 #ifdef USE_OPENSSL
@@ -3076,7 +3076,7 @@ cmd_server (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 	sess->server->network = NULL;
 
 	/* dont clear it for /servchan */
-	if (strncasecmp (word_eol[1], "SERVCHAN ", 9))
+	if (g_ascii_strncasecmp (word_eol[1], "SERVCHAN ", 9))
 		sess->willjoinchannel[0] = 0;
 
 	if (channel)
@@ -3206,7 +3206,7 @@ cmd_unignore (struct session *sess, char *tbuf, char *word[],
 	{
 		if (ignore_del (mask, NULL))
 		{
-			if (strcasecmp (arg, "QUIET"))
+			if (g_ascii_strcasecmp (arg, "QUIET"))
 				EMIT_SIGNAL (XP_TE_IGNOREREMOVE, sess, mask, NULL, NULL, NULL, 0);
 		}
 		return TRUE;
@@ -3222,12 +3222,12 @@ cmd_unload (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 
 	len = strlen (word[2]);
 #ifdef WIN32
-	if (len > 4 && strcasecmp (word[2] + len - 4, ".dll") == 0)
+	if (len > 4 && g_ascii_strcasecmp (word[2] + len - 4, ".dll") == 0)
 #else
 #if defined(__hpux)
-	if (len > 3 && strcasecmp (word[2] + len - 3, ".sl") == 0)
+	if (len > 3 && g_ascii_strcasecmp (word[2] + len - 3, ".sl") == 0)
 #else
-	if (len > 3 && strcasecmp (word[2] + len - 3, ".so") == 0)
+	if (len > 3 && g_ascii_strcasecmp (word[2] + len - 3, ".so") == 0)
 #endif
 #endif
 		by_file = TRUE;
@@ -3257,7 +3257,7 @@ find_server_from_hostname (char *hostname)
 	while (list)
 	{
 		serv = list->data;
-		if (!strcasecmp (hostname, serv->hostname) && serv->connected)
+		if (!g_ascii_strcasecmp (hostname, serv->hostname) && serv->connected)
 			return serv;
 		list = list->next;
 	}
@@ -3310,7 +3310,7 @@ cmd_url (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 			/* maybe we're already connected to this net */
 
 			/* check for "FreeNode" */
-			net = servlist_net_find (server_name, NULL, strcasecmp);
+			net = servlist_net_find (server_name, NULL, g_ascii_strcasecmp);
 			/* check for "irc.eu.freenode.net" */
 			if (!net)
 				net = servlist_net_find_from_server (server_name);
@@ -3705,7 +3705,7 @@ const struct commands xc_cmds[] = {
 static int
 command_compare (const void *a, const void *b)
 {
-	return strcasecmp (a, ((struct commands *)b)->name);
+	return g_ascii_strcasecmp (a, ((struct commands *)b)->name);
 }
 
 static struct commands *
@@ -4277,7 +4277,7 @@ handle_command (session *sess, char *cmd, int check_spch)
 	while (list)
 	{
 		pop = (struct popup *) list->data;
-		if (!strcasecmp (pop->name, word[1]))
+		if (!g_ascii_strcasecmp (pop->name, word[1]))
 		{
 			user_command (sess, tbuf, pop->cmd, word, word_eol);
 			user_cmd = TRUE;
diff --git a/src/common/plugin-timer.c b/src/common/plugin-timer.c
index f09074a8..431ce8ab 100644
--- a/src/common/plugin-timer.c
+++ b/src/common/plugin-timer.c
@@ -4,7 +4,7 @@
 #include "xchat-plugin.h"
 
 #ifdef WIN32
-#define strcasecmp stricmp
+#define g_ascii_strcasecmp stricmp
 #endif
 
 static xchat_plugin *ph;	/* plugin handle */
@@ -151,25 +151,25 @@ timer_cb (char *word[], char *word_eol[], void *userdata)
 		return XCHAT_EAT_XCHAT;
 	}
 
-	if (strcasecmp (word[2], "-quiet") == 0)
+	if (g_ascii_strcasecmp (word[2], "-quiet") == 0)
 	{
 		quiet = TRUE;
 		offset++;
 	}
 
-	if (strcasecmp (word[2 + offset], "-delete") == 0)
+	if (g_ascii_strcasecmp (word[2 + offset], "-delete") == 0)
 	{
 		timer_del_ref (atoi (word[3 + offset]), quiet);
 		return XCHAT_EAT_XCHAT;
 	}
 
-	if (strcasecmp (word[2 + offset], "-refnum") == 0)
+	if (g_ascii_strcasecmp (word[2 + offset], "-refnum") == 0)
 	{
 		ref = atoi (word[3 + offset]);
 		offset += 2;
 	}
 
-	if (strcasecmp (word[2 + offset], "-repeat") == 0)
+	if (g_ascii_strcasecmp (word[2 + offset], "-repeat") == 0)
 	{
 		repeat = atoi (word[3 + offset]);
 		offset += 2;
diff --git a/src/common/plugin.c b/src/common/plugin.c
index 2e81c1f1..0a265d16 100644
--- a/src/common/plugin.c
+++ b/src/common/plugin.c
@@ -309,9 +309,9 @@ plugin_kill (char *name, int by_filename)
 	{
 		pl = list->data;
 		/* static-plugins (plugin-timer.c) have a NULL filename */
-		if ((by_filename && pl->filename && strcasecmp (name, pl->filename) == 0) ||
-			 (by_filename && pl->filename && strcasecmp (name, file_part (pl->filename)) == 0) ||
-			(!by_filename && strcasecmp (name, pl->name) == 0))
+		if ((by_filename && pl->filename && g_ascii_strcasecmp (name, pl->filename) == 0) ||
+			 (by_filename && pl->filename && g_ascii_strcasecmp (name, file_part (pl->filename)) == 0) ||
+			(!by_filename && g_ascii_strcasecmp (name, pl->name) == 0))
 		{
 			/* statically linked plugins have a NULL filename */
 			if (pl->filename != NULL && !pl->fake)
@@ -472,12 +472,12 @@ plugin_hook_find (GSList *list, int type, char *name)
 		hook = list->data;
 		if (hook->type == type)
 		{
-			if (strcasecmp (hook->name, name) == 0)
+			if (g_ascii_strcasecmp (hook->name, name) == 0)
 				return list;
 
 			if (type == HOOK_SERVER)
 			{
-				if (strcasecmp (hook->name, "RAW LINE") == 0)
+				if (g_ascii_strcasecmp (hook->name, "RAW LINE") == 0)
 					return list;
 			}
 		}
@@ -947,8 +947,8 @@ xchat_find_context (xchat_plugin *ph, const char *servname, const char *channel)
 
 		if (servname == NULL ||
 			 rfc_casecmp (servname, serv->servername) == 0 ||
-			 strcasecmp (servname, serv->hostname) == 0 ||
-			 strcasecmp (servname, netname) == 0)
+			 g_ascii_strcasecmp (servname, serv->hostname) == 0 ||
+			 g_ascii_strcasecmp (servname, netname) == 0)
 		{
 			if (channel == NULL)
 				return serv->front_session;
@@ -1121,7 +1121,7 @@ xchat_get_prefs (xchat_plugin *ph, const char *name, const char **string, int *i
 	
 	do
 	{
-		if (!strcasecmp (name, vars[i].name))
+		if (!g_ascii_strcasecmp (name, vars[i].name))
 		{
 			switch (vars[i].type)
 			{
diff --git a/src/common/proto-irc.c b/src/common/proto-irc.c
index a5ebc366..d8a6be7c 100644
--- a/src/common/proto-irc.c
+++ b/src/common/proto-irc.c
@@ -475,12 +475,12 @@ process_numeric (session * sess, int n,
 		}
 
 		/* use /NICKSERV */
-		if (strcasecmp (word[7], "DALnet") == 0 ||
-			 strcasecmp (word[7], "BRASnet") == 0)
+		if (g_ascii_strcasecmp (word[7], "DALnet") == 0 ||
+			 g_ascii_strcasecmp (word[7], "BRASnet") == 0)
 			serv->nickservtype = 1;
 
 		/* use /NS */
-		else if (strcasecmp (word[7], "FreeNode") == 0)
+		else if (g_ascii_strcasecmp (word[7], "FreeNode") == 0)
 			serv->nickservtype = 2;
 
 		goto def;
@@ -1075,9 +1075,9 @@ process_named_msg (session *sess, char *type, char *word[], char *word_eol[])
 					{
 						text[len - 1] = 0;
 						text++;
-						if (strncasecmp (text, "ACTION", 6) != 0)
+						if (g_ascii_strncasecmp (text, "ACTION", 6) != 0)
 							flood_check (nick, ip, serv, sess, 0);
-						if (strncasecmp (text, "DCC ", 4) == 0)
+						if (g_ascii_strncasecmp (text, "DCC ", 4) == 0)
 							/* redo this with handle_quotes TRUE */
 							process_data_init (word[1], word_eol[1], word, word_eol, TRUE, FALSE);
 						ctcp_handle (sess, to, nick, ip, text, word, word_eol, id);
diff --git a/src/common/server.c b/src/common/server.c
index 919d9119..c8cc59e0 100644
--- a/src/common/server.c
+++ b/src/common/server.c
@@ -238,17 +238,17 @@ tcp_send_len (server *serv, char *buf, int len)
 	dbuf[len + 1] = 0;
 
 	/* privmsg and notice get a lower priority */
-	if (strncasecmp (dbuf + 1, "PRIVMSG", 7) == 0 ||
-		 strncasecmp (dbuf + 1, "NOTICE", 6) == 0)
+	if (g_ascii_strncasecmp (dbuf + 1, "PRIVMSG", 7) == 0 ||
+		 g_ascii_strncasecmp (dbuf + 1, "NOTICE", 6) == 0)
 	{
 		dbuf[0] = 1;
 	}
 	else
 	{
 		/* WHO/MODE get the lowest priority */
-		if (strncasecmp (dbuf + 1, "WHO ", 4) == 0 ||
+		if (g_ascii_strncasecmp (dbuf + 1, "WHO ", 4) == 0 ||
 		/* but only MODE queries, not changes */
-			(strncasecmp (dbuf + 1, "MODE", 4) == 0 &&
+			(g_ascii_strncasecmp (dbuf + 1, "MODE", 4) == 0 &&
 			 strchr (dbuf, '-') == NULL &&
 			 strchr (dbuf, '+') == NULL))
 			dbuf[0] = 0;
@@ -319,8 +319,8 @@ server_inline (server *serv, char *line, int len)
 	if (serv->using_irc ||				/* 1. using CP1252/UTF-8 Hybrid */
 		(serv->encoding == NULL && prefs.utf8_locale) || /* OR 2. using system default->UTF-8 */
 	    (serv->encoding != NULL &&				/* OR 3. explicitly set to UTF-8 */
-		 (strcasecmp (serv->encoding, "UTF8") == 0 ||
-		  strcasecmp (serv->encoding, "UTF-8") == 0)))
+		 (g_ascii_strcasecmp (serv->encoding, "UTF8") == 0 ||
+		  g_ascii_strcasecmp (serv->encoding, "UTF-8") == 0)))
 	{
 		/* The user has the UTF-8 charset set, either via /charset
 		command or from his UTF-8 locale. Thus, we first try the
@@ -1824,10 +1824,10 @@ server_set_encoding (server *serv, char *new_encoding)
 			space[0] = 0;
 
 		/* server_inline() uses these flags */
-		if (!strcasecmp (serv->encoding, "CP1255") ||
-			 !strcasecmp (serv->encoding, "WINDOWS-1255"))
+		if (!g_ascii_strcasecmp (serv->encoding, "CP1255") ||
+			 !g_ascii_strcasecmp (serv->encoding, "WINDOWS-1255"))
 			serv->using_cp1255 = TRUE;
-		else if (!strcasecmp (serv->encoding, "IRC"))
+		else if (!g_ascii_strcasecmp (serv->encoding, "IRC"))
 			serv->using_irc = TRUE;
 	}
 }
diff --git a/src/common/servlist.c b/src/common/servlist.c
index c9d4b6a8..aa32aa4d 100644
--- a/src/common/servlist.c
+++ b/src/common/servlist.c
@@ -588,7 +588,7 @@ servlist_connect_by_netname (session *sess, char *network, gboolean join)
 	{
 		net = list->data;
 
-		if (strcasecmp (net->name, network) == 0)
+		if (g_ascii_strcasecmp (net->name, network) == 0)
 		{
 			servlist_connect (sess, net, join);
 			return 1;
@@ -733,7 +733,7 @@ servlist_net_find_from_server (char *server_name)
 		while (slist)
 		{
 			serv = slist->data;
-			if (strcasecmp (serv->hostname, server_name) == 0)
+			if (g_ascii_strcasecmp (serv->hostname, server_name) == 0)
 				return net;
 			slist = slist->next;
 		}
@@ -1018,7 +1018,7 @@ servlist_check_encoding (char *charset)
 	if (c)
 		c[0] = 0;
 
-	if (!strcasecmp (charset, "IRC")) /* special case */
+	if (!g_ascii_strcasecmp (charset, "IRC")) /* special case */
 	{
 		if (c)
 			c[0] = ' ';
@@ -1093,8 +1093,8 @@ servlist_save (void)
 			fprintf (fp, "J=%s\n", net->autojoin);
 		if (net->nickserv)
 			fprintf (fp, "B=%s\n", net->nickserv);
-		if (net->encoding && strcasecmp (net->encoding, "System") &&
-			 strcasecmp (net->encoding, "System default"))
+		if (net->encoding && g_ascii_strcasecmp (net->encoding, "System") &&
+			 g_ascii_strcasecmp (net->encoding, "System default"))
 		{
 			fprintf (fp, "E=%s\n", net->encoding);
 			if (!servlist_check_encoding (net->encoding))
diff --git a/src/common/url.c b/src/common/url.c
index b83732d1..9fa2d75c 100644
--- a/src/common/url.c
+++ b/src/common/url.c
@@ -82,7 +82,7 @@ url_find (char *urltext)
 {
 	int pos;
 
-	if (tree_find (url_tree, urltext, (tree_cmp_func *)strcasecmp, NULL, &pos))
+	if (tree_find (url_tree, urltext, (tree_cmp_func *)g_ascii_strcasecmp, NULL, &pos))
 		return 1;
 	return 0;
 }
@@ -117,7 +117,7 @@ url_add (char *urltext, int len)
 	}
 
 	if (!url_tree)
-		url_tree = tree_new ((tree_cmp_func *)strcasecmp, NULL);
+		url_tree = tree_new ((tree_cmp_func *)g_ascii_strcasecmp, NULL);
 
 	size = tree_size (url_tree);
 	/* 0 is unlimited */
@@ -186,7 +186,7 @@ url_check_word (char *word, int len)
 		{
 			int j;
 
-			/* This is pretty much strncasecmp(). */
+			/* This is pretty much g_ascii_strncasecmp(). */
 			for (j = 0; j < l; j++)
 			{
 				unsigned char c = word[j];
@@ -238,7 +238,7 @@ url_check_word (char *word, int len)
 				const unsigned char *p = &word[len - l];
 				int j;
 
-				/* This is pretty much strncasecmp(). */
+				/* This is pretty much g_ascii_strncasecmp(). */
 				for (j = 0; j < l; j++)
 				{
 					if (tolower(p[j]) != suffix[i].s[j])
diff --git a/src/common/util.c b/src/common/util.c
index 73e1b29a..fb4cd23e 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -283,7 +283,7 @@ nocasestrstr (const char *s, const char *wanted)
 
 	if (len == 0)
 		return (char *)s;
-	while (rfc_tolower(*s) != rfc_tolower(*wanted) || strncasecmp (s, wanted, len))
+	while (rfc_tolower(*s) != rfc_tolower(*wanted) || g_ascii_strncasecmp (s, wanted, len))
 		if (*s++ == '\0')
 			return (char *)NULL;
 	return (char *)s;
@@ -945,7 +945,7 @@ typedef struct
 static int
 country_compare (const void *a, const void *b)
 {
-	return strcasecmp (a, ((domain_t *)b)->code);
+	return g_ascii_strcasecmp (a, ((domain_t *)b)->code);
 }
 
 static const domain_t domain[] =
diff --git a/src/common/xchat.h b/src/common/xchat.h
index 540a7e1a..85c20186 100644
--- a/src/common/xchat.h
+++ b/src/common/xchat.h
@@ -41,8 +41,8 @@ void *xchat_realloc (char *old, int len, char *file, int line);
 
 #ifdef __EMX__						  /* for o/s 2 */
 #define OFLAGS O_BINARY
-#define strcasecmp stricmp
-#define strncasecmp strnicmp
+#define g_ascii_strcasecmp stricmp
+#define g_ascii_strncasecmp strnicmp
 #define PATH_MAX MAXPATHLEN
 #define FILEPATH_LEN_MAX MAXPATHLEN
 #endif
diff --git a/src/fe-gtk/fkeys.c b/src/fe-gtk/fkeys.c
index b9690731..4fbbebf6 100644
--- a/src/fe-gtk/fkeys.c
+++ b/src/fe-gtk/fkeys.c
@@ -1260,11 +1260,11 @@ key_action_scroll_page (GtkWidget * wid, GdkEventKey * evt, char *d1,
 
 	if (d1)
 	{
-		if (!strcasecmp (d1, "up"))
+		if (!g_ascii_strcasecmp (d1, "up"))
 			type = PAGE_UP;
-		else if (!strcasecmp (d1, "+1"))
+		else if (!g_ascii_strcasecmp (d1, "+1"))
 			type = LINE_DOWN;
-		else if (!strcasecmp (d1, "-1"))
+		else if (!g_ascii_strcasecmp (d1, "-1"))
 			type = LINE_UP;
 	}
 
diff --git a/src/fe-gtk/maingui.c b/src/fe-gtk/maingui.c
index 0b7f7c43..1ff59354 100644
--- a/src/fe-gtk/maingui.c
+++ b/src/fe-gtk/maingui.c
@@ -1688,7 +1688,7 @@ mg_dnd_drop_file (session *sess, char *target, char *uri)
 	while (*p)
 	{
 		next = strchr (p, '\r');
-		if (strncasecmp ("file:", p, 5) == 0)
+		if (g_ascii_strncasecmp ("file:", p, 5) == 0)
 		{
 			if (next)
 				*next = 0;
@@ -2911,7 +2911,7 @@ mg_tabs_compare (session *a, session *b)
 	if (a->type != SESS_CHANNEL && b->type == SESS_CHANNEL)
 		return 1;
 
-	return strcasecmp (a->channel, b->channel);
+	return g_ascii_strcasecmp (a->channel, b->channel);
 }
 
 static void
diff --git a/src/fe-gtk/menu.c b/src/fe-gtk/menu.c
index 4760ba93..2a683604 100644
--- a/src/fe-gtk/menu.c
+++ b/src/fe-gtk/menu.c
@@ -484,18 +484,18 @@ menu_create (GtkWidget *menu, GSList *list, char *target, int check_path)
 	{
 		pop = (struct popup *) list->data;
 
-		if (!strncasecmp (pop->name, "SUB", 3))
+		if (!g_ascii_strncasecmp (pop->name, "SUB", 3))
 		{
 			childcount = 0;
 			tempmenu = menu_quick_sub (pop->cmd, tempmenu, &subitem, XCMENU_DOLIST|XCMENU_MNEMONIC, -1);
 
-		} else if (!strncasecmp (pop->name, "TOGGLE", 6))
+		} else if (!g_ascii_strncasecmp (pop->name, "TOGGLE", 6))
 		{
 			childcount++;
 			menu_toggle_item (pop->name + 7, tempmenu, toggle_cb, pop->cmd,
 									cfg_get_bool (pop->cmd));
 
-		} else if (!strncasecmp (pop->name, "ENDSUB", 6))
+		} else if (!g_ascii_strncasecmp (pop->name, "ENDSUB", 6))
 		{
 			/* empty sub menu due to no programs in PATH? */
 			if (check_path && childcount < 1)
@@ -506,7 +506,7 @@ menu_create (GtkWidget *menu, GSList *list, char *target, int check_path)
 				tempmenu = menu_quick_endsub ();
 			/* If we get here and tempmenu equals menu that means we havent got any submenus to exit from */
 
-		} else if (!strncasecmp (pop->name, "SEP", 3))
+		} else if (!g_ascii_strncasecmp (pop->name, "SEP", 3))
 		{
 			menu_quick_item (0, 0, tempmenu, XCMENU_SHADED, 0, 0);
 
@@ -2190,7 +2190,7 @@ menu_create_main (void *accel_group, int bar, int away, int toplevel,
 		g_object_get (settings, "gtk-key-theme-name", &key_theme, NULL);
 		if (key_theme)
 		{
-			if (!strcasecmp (key_theme, "Emacs"))
+			if (!g_ascii_strcasecmp (key_theme, "Emacs"))
 			{
 				close_mask = GDK_SHIFT_MASK | GDK_CONTROL_MASK;
 				mymenu[SEARCH_OFFSET].key = 0;
diff --git a/src/fe-gtk/notifygui.c b/src/fe-gtk/notifygui.c
index 5acb683a..135a548d 100644
--- a/src/fe-gtk/notifygui.c
+++ b/src/fe-gtk/notifygui.c
@@ -321,7 +321,7 @@ notifygui_add_cb (GtkDialog *dialog, gint response, gpointer entry)
 	if (text[0] && response == GTK_RESPONSE_ACCEPT)
 	{
 		networks = GTK_ENTRY (g_object_get_data (G_OBJECT (entry), "net"))->text;
-		if (strcasecmp (networks, "ALL") == 0 || networks[0] == 0)
+		if (g_ascii_strcasecmp (networks, "ALL") == 0 || networks[0] == 0)
 			notify_adduser (text, NULL);
 		else
 			notify_adduser (text, networks);
diff --git a/src/fe-gtk/plugingui.c b/src/fe-gtk/plugingui.c
index 71d2f02e..7d2dc85d 100644
--- a/src/fe-gtk/plugingui.c
+++ b/src/fe-gtk/plugingui.c
@@ -176,12 +176,12 @@ plugingui_unload (GtkWidget * wid, gpointer unused)
 
 	len = strlen (file);
 #ifdef WIN32
-	if (len > 4 && strcasecmp (file + len - 4, ".dll") == 0)
+	if (len > 4 && g_ascii_strcasecmp (file + len - 4, ".dll") == 0)
 #else
 #if defined(__hpux)
-	if (len > 3 && strcasecmp (file + len - 3, ".sl") == 0)
+	if (len > 3 && g_ascii_strcasecmp (file + len - 3, ".sl") == 0)
 #else
-	if (len > 3 && strcasecmp (file + len - 3, ".so") == 0)
+	if (len > 3 && g_ascii_strcasecmp (file + len - 3, ".so") == 0)
 #endif
 #endif
 	{
diff --git a/src/fe-gtk/sexy-spell-entry.c b/src/fe-gtk/sexy-spell-entry.c
index 9483f04b..d6f4ad63 100644
--- a/src/fe-gtk/sexy-spell-entry.c
+++ b/src/fe-gtk/sexy-spell-entry.c
@@ -976,7 +976,7 @@ sexy_spell_entry_activate_default_languages(SexySpellEntry *entry)
 	enchant_langs = sexy_spell_entry_get_languages(entry);
 
 	/*for (i = 0; langs[i]; i++) {
-		if ((g_strncasecmp(langs[i], "C", 1) != 0) &&
+		if ((g_ascii_strncasecmp(langs[i], "C", 1) != 0) &&
 		    (strlen(langs[i]) >= 2) &&
 		    enchant_has_lang(langs[i], enchant_langs)) {
 			if ((lastprefix == NULL) || (g_str_has_prefix(langs[i], lastprefix) == FALSE))
@@ -1013,7 +1013,7 @@ sexy_spell_entry_activate_default_languages(SexySpellEntry *entry)
 	lang = (gchar *) g_getenv("LANG");
 
 	if (lang != NULL) {
-		if (g_strncasecmp(lang, "C", 1) == 0)
+		if (g_ascii_strncasecmp(lang, "C", 1) == 0)
 			lang = NULL;
 		else if (lang[0] == '\0')
 			lang = NULL;
diff --git a/src/fe-gtk/xtext.c b/src/fe-gtk/xtext.c
index 6e314f68..547affee 100644
--- a/src/fe-gtk/xtext.c
+++ b/src/fe-gtk/xtext.c
@@ -198,7 +198,7 @@ nocasestrstr (const char *s, const char *tofind)
 
    if (len == 0)
      return (char *)s;
-   while (toupper(*s) != toupper(*tofind) || strncasecmp (s, tofind, len))
+   while (toupper(*s) != toupper(*tofind) || g_ascii_strncasecmp (s, tofind, len))
      if (*s++ == '\0')
        return (char *)NULL;
    return (char *)s;