Dang Jak.... That did cure it. :D Thanks for the tip. I don't play this amp as much as my Spider Valve MkII Boghner, but I want to start bringing in a smaller set up for some other gigs. Thanks again!!
I'm starting to have the exact same issues today too. It's never happened before. I too have the upgraded firmware. It's a little hotter in my apt today but it would be no different of an environment than if I was at a club with this amp. I have too many custom tones to want to try a master reset. Is there some kind of patch fix for this?