> OK it's definitely something between 0.136 and 0.137. I downloaded both versions and > extracted into new directories and 0.137 consistently tops out at 75% and 0.136 goes > around 800%. I can go back and forth between versions with the same results. Any idea > how to break this down into u releases?
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.