I have had some issues with the new version of Mamewah while running ESPXE on it. Here is what I have found.
After running the first game and exiting back to the main menu, a toolbar - sized line the same color as the desktop appears at the bottom of the screen.
This is the odd one-- Mamewah will constantly reload the last ROM played over and over and over with no way to get out of it other than ctrl-alt-delete. I exit the game, and Mamewah will simply reload the ROM in EPSXE. Strange stuff. It is not a hardware issue as far as I can tell.
I have not tried replicating any of this with any other emulator... just EPSXE. Not too sure if anyone else has played around with EPSXE and MAamewah 1.5 or not, but I thought maybe someone can confirm my findings.
Thanks
APf