probably rules out bad files, maybe a witchdoctor put a curse on your computer? make any gypsys upset lately?Works perfectly in 0.19_01
Edit: Updated to 0.20 and it crashed again...
on a more serious note this is probably a rare bug caused by some change nilllzz made to that between 0.19_1 and 0.20. he's not online right now (skype says its 4 in the morning where he is) so we won't get an immediate response on this, but something can probably be done. might require a 0.20_1 patch. again, im sorry we can't resolve this right now, but the bugs been noted. thanks for bringing it to our attention and helping us isolate the cause to something reasonable