I've applied the dimmer fix, but this did not help. One other bit of weirdness I noticed was that while in the Illumination level menu, the display will sometimes dim to almost invisible (0 percent level) and then later go back to regular level after a short period. When in DC mode, the dimmer menu is very unresponsive and hard to control. In fact it really doesn't like to display anything but 100 percent brightness, even if set to 0 percent. All the while the dimmer is adjusted, the button LEDs flicker on and off as if the microcontroller is having some sort of trouble interrpreting the commands. Timing issues? I think Mark was on to something with the dimmer fix, but unfortunately, the dimmer fix doesn't fix this.

Stu