2015-06-30 13:32:17: ERROR[main]: MAINMENU ERROR: /usr/share/minetest/builtin/mainmenu/common.lua:330: attempt to concatenate local 'mode' (a nil value)
2015-06-30 13:32:17: ERROR[main]: stack traceback:
2015-06-30 13:32:17: ERROR[main]: 	/usr/share/minetest/builtin/mainmenu/common.lua:330: in function 'menu_worldmt_legacy'
2015-06-30 13:32:17: ERROR[main]: 	/usr/share/minetest/builtin/mainmenu/tab_singleplayer.lua:110: in function 'handle_buttons'
2015-06-30 13:32:17: ERROR[main]: 	/usr/share/minetest/builtin/fstk/ui.lua:140: in function 'handle_buttons'
2015-06-30 13:32:17: ERROR[main]: 	/usr/share/minetest/builtin/fstk/ui.lua:177: in function </usr/share/minetest/builtin/fstk/ui.lua:170>