diff --git a/builtin/mainmenu/common.lua b/builtin/mainmenu/common.lua
old mode 100644
new mode 100755
index 6126c61a4..3291af92a
--- a/builtin/mainmenu/common.lua
+++ b/builtin/mainmenu/common.lua
@@ -300,3 +300,34 @@ function is_server_protocol_compat_or_error(proto_min, proto_max)
 
 	return true
 end
+
+--------------------------------------------------------------------------------
+local function menu_load_worldmt(selected)
+	if menudata.worldlist:get_list()[selected] ~= nil then
+		local world = menudata.worldlist:get_list()[selected]
+		return world
+	else
+		return nil
+	end
+end
+
+function menu_get_worldmt(selected, setting)
+	local world = menu_load_worldmt(selected)
+	local filename = world.path .. DIR_DELIM .. "world.mt"
+	local world_conf = Settings(filename)
+
+	return world_conf:get(setting)
+end
+
+function menu_set_worldmt(selected, setting, value)
+	local world = menu_load_worldmt(selected)
+	if not world then return nil end
+
+	local filename = world.path .. DIR_DELIM .. "world.mt"
+	local world_conf = Settings(filename)
+	if not world_conf:write() then
+		core.log("error", "Failed to write world config file")
+	end
+
+	return world_conf:set(setting, value)
+end
diff --git a/builtin/mainmenu/tab_server.lua b/builtin/mainmenu/tab_server.lua
index d78af768f..863eb2739 100644
--- a/builtin/mainmenu/tab_server.lua
+++ b/builtin/mainmenu/tab_server.lua
@@ -67,31 +67,20 @@ local function main_button_handler(this, fields, name, tabdata)
 
 	if fields["srv_worlds"] ~= nil then
 		local event = core.explode_textlist_event(fields["srv_worlds"])
-
 		local selected = core.get_textlist_index("srv_worlds")
-		if selected ~= nil then
-			local filename = menudata.worldlist:get_list()[selected].path
-			local worldconfig = modmgr.get_worldconfig(filename)
-			filename = filename .. DIR_DELIM .. "world.mt"
+		local creative_mode = menu_get_worldmt(selected, "creative_mode")
 
-			if worldconfig.creative_mode ~= nil then
-				core.setting_set("creative_mode", worldconfig.creative_mode)
-			else
-				local worldfile = Settings(filename)
-				worldfile:set("creative_mode", core.setting_get("creative_mode"))
-				if not worldfile:write() then
-					core.log("error", "Failed to write world config file")
-				end
-			end
-			if worldconfig.enable_damage ~= nil then
-				core.setting_set("enable_damage", worldconfig.enable_damage)
-			else
-				local worldfile = Settings(filename)
-				worldfile:set("enable_damage", core.setting_get("enable_damage"))
-				if not worldfile:write() then
-					core.log("error", "Failed to write world config file")
-				end
-			end
+		if creative_mode ~= nil then
+			core.setting_set("creative_mode", creative_mode)
+		else
+			menu_set_worldmt(selected, "creative_mode", core.setting_get("creative_mode"))
+		end
+
+		local enable_damage = menu_get_worldmt(selected, "enable_damage")
+		if enable_damage ~= nil then
+			core.setting_set("enable_damage", enable_damage)
+		else
+			menu_set_worldmt(selected, "enable_damage", core.setting_get("enable_damage"))
 		end
 
 		if event.type == "DCL" then
@@ -111,28 +100,16 @@ local function main_button_handler(this, fields, name, tabdata)
 	if fields["cb_creative_mode"] then
 		core.setting_set("creative_mode", fields["cb_creative_mode"])
 		local selected = core.get_textlist_index("srv_worlds")
-		local filename = menudata.worldlist:get_list()[selected].path ..
-				DIR_DELIM .. "world.mt"
+		menu_set_worldmt(selected, "creative_mode", fields["cb_creative_mode"])
 
-		local worldfile = Settings(filename)
-		worldfile:set("creative_mode", fields["cb_creative_mode"])
-		if not worldfile:write() then
-			core.log("error", "Failed to write world config file")
-		end
 		return true
 	end
 
 	if fields["cb_enable_damage"] then
 		core.setting_set("enable_damage", fields["cb_enable_damage"])
 		local selected = core.get_textlist_index("srv_worlds")
-		local filename = menudata.worldlist:get_list()[selected].path ..
-				DIR_DELIM .. "world.mt"
+		menu_set_worldmt(selected, "enable_damage", fields["cb_enable_damage"])
 
-		local worldfile = Settings(filename)
-		worldfile:set("enable_damage", fields["cb_enable_damage"])
-		if not worldfile:write() then
-			core.log("error", "Failed to write world config file")
-		end
 		return true
 	end
 
@@ -159,9 +136,11 @@ local function main_button_handler(this, fields, name, tabdata)
 
 			--update last game
 			local world = menudata.worldlist:get_raw_element(gamedata.selected_world)
+			if world ~= nil then
+				local game, index = gamemgr.find_by_gameid(world.gameid)
+				core.setting_set("menu_last_game", game.id)
+			end
 			
-			local game,index = gamemgr.find_by_gameid(world.gameid)
-			core.setting_set("menu_last_game",game.id)
 			core.start()
 			return true
 		end
diff --git a/builtin/mainmenu/tab_singleplayer.lua b/builtin/mainmenu/tab_singleplayer.lua
old mode 100644
new mode 100755
index c2b850e44..c36be48d8
--- a/builtin/mainmenu/tab_singleplayer.lua
+++ b/builtin/mainmenu/tab_singleplayer.lua
@@ -23,9 +23,9 @@ local function current_game()
 end
 
 local function singleplayer_refresh_gamebar()
-	
+
 	local old_bar = ui.find_by_name("game_button_bar")
-	
+
 	if old_bar ~= nil then
 		old_bar:delete()
 	end
@@ -76,7 +76,7 @@ end
 
 local function get_formspec(tabview, name, tabdata)
 	local retval = ""
-	
+
 	local index = filterlist.get_current_index(menudata.worldlist,
 				tonumber(core.setting_get("mainmenu_last_selected_world"))
 				)
@@ -105,31 +105,20 @@ local function main_button_handler(this, fields, name, tabdata)
 
 	if fields["sp_worlds"] ~= nil then
 		local event = core.explode_textlist_event(fields["sp_worlds"])
-
 		local selected = core.get_textlist_index("sp_worlds")
-		if selected ~= nil then
-			local filename = menudata.worldlist:get_list()[selected].path
-			local worldconfig = modmgr.get_worldconfig(filename)
-			filename = filename .. DIR_DELIM .. "world.mt"
+		local creative_mode = menu_get_worldmt(selected, "creative_mode")
 
-			if worldconfig.creative_mode ~= nil then
-				core.setting_set("creative_mode", worldconfig.creative_mode)
-			else
-				local worldfile = Settings(filename)
-				worldfile:set("creative_mode", core.setting_get("creative_mode"))
-				if not worldfile:write() then
-					core.log("error", "Failed to write world config file")
-				end
-			end
-			if worldconfig.enable_damage ~= nil then
-				core.setting_set("enable_damage", worldconfig.enable_damage)
-			else
-				local worldfile = Settings(filename)
-				worldfile:set("enable_damage", core.setting_get("enable_damage"))
-				if not worldfile:write() then
-					core.log("error", "Failed to write world config file")
-				end
-			end
+		if creative_mode ~= nil then
+			core.setting_set("creative_mode", creative_mode)
+		else
+			menu_set_worldmt(selected, "creative_mode", core.setting_get("creative_mode"))
+		end
+
+		local enable_damage = menu_get_worldmt(selected, "enable_damage")
+		if enable_damage ~= nil then
+			core.setting_set("enable_damage", enable_damage)
+		else
+			menu_set_worldmt(selected, "enable_damage", core.setting_get("enable_damage"))
 		end
 
 		if event.type == "DCL" then
@@ -150,28 +139,16 @@ local function main_button_handler(this, fields, name, tabdata)
 	if fields["cb_creative_mode"] then
 		core.setting_set("creative_mode", fields["cb_creative_mode"])
 		local selected = core.get_textlist_index("sp_worlds")
-		local filename = menudata.worldlist:get_list()[selected].path ..
-				DIR_DELIM .. "world.mt"
+		menu_set_worldmt(selected, "creative_mode", fields["cb_creative_mode"])
 
-		local worldfile = Settings(filename)
-		worldfile:set("creative_mode", fields["cb_creative_mode"])
-		if not worldfile:write() then
-			core.log("error", "Failed to write world config file")
-		end
 		return true
 	end
 
 	if fields["cb_enable_damage"] then
 		core.setting_set("enable_damage", fields["cb_enable_damage"])
 		local selected = core.get_textlist_index("sp_worlds")
-		local filename = menudata.worldlist:get_list()[selected].path ..
-				DIR_DELIM .. "world.mt"
+		menu_set_worldmt(selected, "enable_damage", fields["cb_enable_damage"])
 
-		local worldfile = Settings(filename)
-		worldfile:set("enable_damage", fields["cb_enable_damage"])
-		if not worldfile:write() then
-			core.log("error", "Failed to write world config file")
-		end
 		return true
 	end