I was trying to configure my controls today and found that when I "tab" in go to general input, the screen doesn't show. I think it's at the very bottom of screen and not showing or usable. I'm running 0.179. All that comes up with this issue is supposed to have been resolved. Here is the only recorded problem I can find.... any help would be greatly appreciated!!
http://mametesters.org/view.php?id=6335
Re: Mame general input tab off screen not working
Latest release is 0.181 which should resolve the issue you're experiencing.