2013.1.20 version. Windows.
Continued from a build the day before but there appears to be no savegame compatibility problems. There was some lighting changes in github on 2013.1.19.
Car vanishes under me when travelling east. If I go north for an hour and head east it disappears too, it is like some sort of magic line that I cannot cross.
Have a savegame, drive east pass the slime pool and it happens.
Debug log: C:\cygwin\home\Kyratzes\Cataclysm-DDA\game.cpp[6377]: game::pldrive error: can’t find vehicle! Drive mode is now off.
https://www.dropbox.com/s/lx4eoyda1d3fkn5/save.zip