@BST Although Nicholi stated to have used DivX codec in his OGM
-@Nicholi:did you eventually set up ffdshow to decode DivX with XVid decoder??-
there is an interesting thread over @Doom9
http://forum.doom9.org/showthread.php?s=&threadid=42205 about subtitle display problems in conjunction with b-frame decoding errors in XVid encoded OGMs. Maybe the reason for crashing bsplayer does not derive from your last optimations...
Please have a look, thank you!