I just recently got my first cab in working order. I've been playing it for about 1-2 months and never really had any issues with it myself.
This past weekend I had some family over for the holidays and had a few 13 and under kids playing on the cab (who pretty much freaked when they saw it, btw). I don't know what those kids were doing, but it kept locking up, getting HPs crash screen displayed, losing focus of my frontend, etc.
I never had any of those problems! It amazes me that kids can find all the right buttons to push to screw things up!

Every 30 minutes they'd come in and tell me it was messed up. I'd have to open the cab to get my keyboard out and cntrl-alt-delete to end tasks or reboot. Sometimes I'd see multiple copies of my frontend running (not sure how they did that?!?) or the mame.exe would be taking up massive memory, etc.
Guess I have to play around with it somemore now to figure out why it wasn't holding up to the beating they were giving it
