I just had a glitch when I was going home today. Same issue, empeg booted, screen was fine, then once the player loaded, the dimmer dropped too low. (I had my headlights on.

I went into the dimmer control, and used the left and right buttons this time to try and change it, and got some odd results. Initially it was at 60% like I keep it all the time for the night. So I pressed right once, it jumped to 70% and looked like the right brightness. Pressed left, and the screen showed 60%, but it looked like 0%. Pressing left again put it down to 50%, and the screen brightness was correct. Pressing right again, and the display dropped down to the 0% looking setting, while showing 60%.

I continued to play with it, and it was always right if I went 70% or above, and it randomly worked properly 50% and below. After about 30 clicks with the buttons playing with it, 60% finally showed up at the right brightness.

This is on my new Mark 2a, and I first noticed it on my old Mark 2. I am running 2.0 Beta 7 now. And just to reiterate, I never saw this issue with 1.03.