diff --git a/src/client.cpp b/src/client.cpp
index 248cd8a4..449b0c2f 100644
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -333,16 +333,16 @@ void Client::step(float dtime)
 					true, &deleted_blocks);*/
 			
 			// Delete whole sectors
-			u32 num = m_env.getMap().unloadUnusedData
+			m_env.getMap().unloadUnusedData
 					(delete_unused_sectors_timeout,
-					false, &deleted_blocks);
+					&deleted_blocks);
 
-			if(num > 0)
+			if(deleted_blocks.size() > 0)
 			{
 				/*dstream<<DTIME<<"Client: Deleted blocks of "<<num
 						<<" unused sectors"<<std::endl;*/
-				dstream<<DTIME<<"Client: Deleted "<<num
-						<<" unused sectors"<<std::endl;
+				/*dstream<<DTIME<<"Client: Deleted "<<num
+						<<" unused sectors"<<std::endl;*/
 				
 				/*
 					Send info to server
diff --git a/src/defaultsettings.cpp b/src/defaultsettings.cpp
index 435eefd8..99bead6b 100644
--- a/src/defaultsettings.cpp
+++ b/src/defaultsettings.cpp
@@ -82,6 +82,7 @@ void set_default_settings()
 	g_settings.setDefault("default_password", "");
 	g_settings.setDefault("default_privs", "build, shout");
 	g_settings.setDefault("profiler_print_interval", "0");
+	g_settings.setDefault("enable_mapgen_debug_info", "false");
 
 	g_settings.setDefault("objectdata_interval", "0.2");
 	g_settings.setDefault("active_object_range", "2");
diff --git a/src/environment.cpp b/src/environment.cpp
index d9c62978..b52a46dd 100644
--- a/src/environment.cpp
+++ b/src/environment.cpp
@@ -801,6 +801,9 @@ void ServerEnvironment::step(float dtime)
 			MapBlock *block = m_map->getBlockNoCreateNoEx(p);
 			if(block==NULL)
 				continue;
+
+			// Reset block usage timer
+			block->resetUsageTimer();
 			
 			// Set current time as timestamp
 			block->setTimestampNoChangedFlag(m_game_time);
diff --git a/src/map.cpp b/src/map.cpp
index 5bf27866..2cf7bb2e 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -1388,8 +1388,6 @@ bool Map::dayNightDiffed(v3s16 blockpos)
 */
 void Map::timerUpdate(float dtime)
 {
-	//JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
-
 	core::map<v2s16, MapSector*>::Iterator si;
 
 	si = m_sectors.getIterator();
@@ -1407,38 +1405,27 @@ void Map::timerUpdate(float dtime)
 	}
 }
 
-void Map::deleteSectors(core::list<v2s16> &list, bool only_blocks)
+void Map::deleteSectors(core::list<v2s16> &list)
 {
 	core::list<v2s16>::Iterator j;
 	for(j=list.begin(); j!=list.end(); j++)
 	{
 		MapSector *sector = m_sectors[*j];
-		if(only_blocks)
-		{
-			sector->deleteBlocks();
-		}
-		else
-		{
-			/*
-				If sector is in sector cache, remove it from there
-			*/
-			if(m_sector_cache == sector)
-			{
-				m_sector_cache = NULL;
-			}
-			/*
-				Remove from map and delete
-			*/
-			m_sectors.remove(*j);
-			delete sector;
-		}
+		// If sector is in sector cache, remove it from there
+		if(m_sector_cache == sector)
+			m_sector_cache = NULL;
+		// Remove from map and delete
+		m_sectors.remove(*j);
+		delete sector;
 	}
 }
 
-u32 Map::unloadUnusedData(float timeout, bool only_blocks,
+void Map::unloadUnusedData(float timeout,
 		core::list<v3s16> *deleted_blocks)
 {
 	core::list<v2s16> sector_deletion_queue;
+	u32 deleted_blocks_count = 0;
+	u32 saved_blocks_count = 0;
 
 	core::map<v2s16, MapSector*>::Iterator si = m_sectors.getIterator();
 	for(; si.atEnd() == false; si++)
@@ -1453,14 +1440,18 @@ u32 Map::unloadUnusedData(float timeout, bool only_blocks,
 				i != blocks.end(); i++)
 		{
 			MapBlock *block = (*i);
-
+			
 			if(block->getUsageTimer() > timeout)
 			{
 				// Save if modified
 				if(block->getModified() != MOD_STATE_CLEAN)
+				{
 					saveBlock(block);
+					saved_blocks_count++;
+				}
 				// Delete from memory
 				sector->deleteBlock(block);
+				deleted_blocks_count++;
 			}
 			else
 			{
@@ -1474,36 +1465,14 @@ u32 Map::unloadUnusedData(float timeout, bool only_blocks,
 		}
 	}
 
-#if 0
-	core::map<v2s16, MapSector*>::Iterator i = m_sectors.getIterator();
-	for(; i.atEnd() == false; i++)
-	{
-		MapSector *sector = i.getNode()->getValue();
-		/*
-			Delete sector from memory if it hasn't been used in a long time
-		*/
-		if(sector->usage_timer > timeout)
-		{
-			sector_deletion_queue.push_back(i.getNode()->getKey());
+	deleteSectors(sector_deletion_queue);
 
-			if(deleted_blocks != NULL)
-			{
-				// Collect positions of blocks of sector
-				MapSector *sector = i.getNode()->getValue();
-				core::list<MapBlock*> blocks;
-				sector->getBlocks(blocks);
-				for(core::list<MapBlock*>::Iterator i = blocks.begin();
-						i != blocks.end(); i++)
-				{
-					deleted_blocks->push_back((*i)->getPos());
-				}
-			}
-		}
-	}
-#endif
+	dstream<<"Map: Unloaded "<<deleted_blocks_count<<" blocks from memory"
+			<<", of which "<<saved_blocks_count<<" were wr."
+			<<std::endl;
 
-	deleteSectors(sector_deletion_queue, only_blocks);
-	return sector_deletion_queue.getSize();
+	//return sector_deletion_queue.getSize();
+	//return deleted_blocks_count;
 }
 
 void Map::PrintInfo(std::ostream &out)
@@ -2083,6 +2052,8 @@ MapBlock* ServerMap::finishBlockMake(mapgen::BlockMakeData *data,
 		return NULL;
 	}
 
+	bool enable_mapgen_debug_info = g_settings.getBool("enable_mapgen_debug_info");
+
 	/*dstream<<"Resulting vmanip:"<<std::endl;
 	data->vmanip.print(dstream);*/
 	
@@ -2095,10 +2066,11 @@ MapBlock* ServerMap::finishBlockMake(mapgen::BlockMakeData *data,
 		//TimeTaker timer("finishBlockMake() blitBackAll");
 		data->vmanip->blitBackAll(&changed_blocks);
 	}
-#if 1
-	dstream<<"finishBlockMake: changed_blocks.size()="
-			<<changed_blocks.size()<<std::endl;
-#endif
+
+	if(enable_mapgen_debug_info)
+		dstream<<"finishBlockMake: changed_blocks.size()="
+				<<changed_blocks.size()<<std::endl;
+
 	/*
 		Copy transforming liquid information
 	*/
@@ -2155,6 +2127,9 @@ MapBlock* ServerMap::finishBlockMake(mapgen::BlockMakeData *data,
 		}
 	#endif
 		updateLighting(lighting_update_blocks, changed_blocks);
+
+		if(enable_mapgen_debug_info == false)
+			t.stop(true); // Hide output
 	}
 
 	/*
@@ -2269,6 +2244,8 @@ MapBlock * ServerMap::generateBlock(
 			<<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
 			<<std::endl;*/
 	
+	bool enable_mapgen_debug_info = g_settings.getBool("enable_mapgen_debug_info");
+
 	TimeTaker timer("generateBlock");
 	
 	//MapBlock *block = original_dummy;
@@ -2297,6 +2274,9 @@ MapBlock * ServerMap::generateBlock(
 	{
 		TimeTaker t("mapgen::make_block()");
 		mapgen::make_block(&data);
+
+		if(enable_mapgen_debug_info == false)
+			t.stop(true); // Hide output
 	}
 
 	/*
@@ -2355,6 +2335,9 @@ MapBlock * ServerMap::generateBlock(
 	}
 #endif
 
+	if(enable_mapgen_debug_info == false)
+		timer.stop(true); // Hide output
+
 	return block;
 }
 
diff --git a/src/map.h b/src/map.h
index c64f8cbd..2fe74900 100644
--- a/src/map.h
+++ b/src/map.h
@@ -230,13 +230,18 @@ class Map /*: public NodeContainer*/
 		Updates usage timers
 	*/
 	void timerUpdate(float dtime);
-	
+		
+	// Deletes sectors and their blocks from memory
 	// Takes cache into account
-	// sector mutex should be locked when calling
-	void deleteSectors(core::list<v2s16> &list, bool only_blocks);
+	// If deleted sector is in sector cache, clears cache
+	void deleteSectors(core::list<v2s16> &list);
 	
-	// Returns count of deleted sectors
-	u32 unloadUnusedData(float timeout, bool only_blocks=false,
+	/*
+		Unload unused data
+		= flush changed to disk and delete from memory, if usage timer of
+		  block is more than timeout
+	*/
+	void unloadUnusedData(float timeout,
 			core::list<v3s16> *deleted_blocks=NULL);
 
 	// For debug printing
diff --git a/src/mapblock.cpp b/src/mapblock.cpp
index 7036cd03..c125e67c 100644
--- a/src/mapblock.cpp
+++ b/src/mapblock.cpp
@@ -38,7 +38,7 @@ MapBlock::MapBlock(Map *parent, v3s16 pos, bool dummy):
 		m_generated(false),
 		m_objects(this),
 		m_timestamp(BLOCK_TIMESTAMP_UNDEFINED),
-		m_usage_timer(BLOCK_TIMESTAMP_UNDEFINED)
+		m_usage_timer(0)
 {
 	data = NULL;
 	if(dummy == false)
diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index e481ee30..4a2a39ae 100644
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -1389,7 +1389,7 @@ void make_block(BlockMakeData *data)
 	/*
 		Create a block-specific seed
 	*/
-	u32 blockseed = (data->seed%0x100000000) + full_node_min.Z*38134234
+	u32 blockseed = (u32)(data->seed%0x100000000) + full_node_min.Z*38134234
 			+ full_node_min.Y*42123 + full_node_min.X*23;
 	
 	/*
diff --git a/src/server.cpp b/src/server.cpp
index 2ee94f34..b65f0bdb 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -1831,17 +1831,21 @@ void Server::AsyncRunStep()
 			JMutexAutoLock lock(m_env_mutex);
 			if(((ServerMap*)(&m_env.getMap()))->isSavingEnabled() == true)
 			{
+				// Unload unused data (delete from memory)
+				m_env.getMap().unloadUnusedData(
+						g_settings.getFloat("server_unload_unused_sectors_timeout"));
+				/*u32 deleted_count = m_env.getMap().unloadUnusedData(
+						g_settings.getFloat("server_unload_unused_sectors_timeout"));
+						*/
+
 				// Save only changed parts
 				m_env.getMap().save(true);
 
-				// Delete unused sectors
-				u32 deleted_count = m_env.getMap().unloadUnusedData(
-						g_settings.getFloat("server_unload_unused_sectors_timeout"));
-				if(deleted_count > 0)
+				/*if(deleted_count > 0)
 				{
 					dout_server<<"Server: Unloaded "<<deleted_count
-							<<" sectors from memory"<<std::endl;
-				}
+							<<" blocks from memory"<<std::endl;
+				}*/
 
 				// Save players
 				m_env.serializePlayers(m_mapsavedir);