I have 100% of crash after start a game:
20:43:24: ERROR[main]: ServerError: LuaError: error: ...t/minetest/bin/../games/common/mods/default/init.lua:2450: attempt to call field 'cool_lava_flowing' (a nil value)
All times the same error. Maybe a problem with a old mod. :-/
System: GNU Linux Debian
Game Version: 0.4.6 (updated today, 03/apr/2013)
