Just finished downloading/testing. It ran 100% in .129. Somewhere between .129u1 and .130 is where the problem originates. That goes for the gfx flickering as well. Perhaps the bug report for this should be updated since it claims it started in 131u2?
Looks like your suspicions were correct Tafoid. January 2009 (.129 release) has definitely been awhile ago. Maybe I played the Genesis version on Kega in the last few months and got them mixed up