After reading your post, I decided to sit down and try. I normally never change the volume on the empeg - I use the head unit's volume control instead.

However, after playing with the volume buttons for only a few seconds, IT happened. And during the next two minutes (me pressing the volume buttons up and down all the time), it happend at least six to eight more times, both running upwards and downwards. After two minutes it became rarer, but still happened around once every two minutes. And it's definitely not a physically sticking button, because I could hear the microswitch click at every key-press and -release (the empeg currently sits on my desk, and of course I turned off the amplifier before trying that...).

So, the answer is: yes, it happens on my empeg. The serial number is 00112, and it's running beta 10 (non-A). And no, I didn't listen to a Madonna song...

Daniel