> Just a thought before you go looking at u releases: are you sure that the same > options are set in the mame.ini used by both version 0.136 and 0.137 - or that > they're both trying to load the same known-good mame.ini? > > There have been times where I've lost track of which mame.ini I'm using when working > with multiple versions, and have seen performance issues as a result.
Well, this is using a fresh 'install' of MAME into two new separate directories, so they are both using the exact same 'defaults'.