These are the changes to the fixed MAME beta 12 binary as far as I know: - Fixed the loading of samples in CPS-2 QSound games. This alone would have no affect on playbackability (that's a word?) - Enabled the ASM 68K CPU core. This is very likely to affect all 68K-based. This will probably affect all 68K based games (except 68020 games (Taito-F3, Psikyo), that is separate now, and still C- based) - Fixed the accidental breaking of Neo Geo games. They should all work now.(posted 9067 days ago)So any 68000 or 68010 based games recorded in the first beta 12 is highly unlikely to work in the fixed beta.
Hope this clears it up somewhat.