Excactly! I've sent an email to rob with the following detailed description:

“The Bug”:
If I go to Settings->dimmer to adjust the brightness, The following happens:

Issue 1: Starting at 100%, down to 0%
The brighness varies RANDOMLY, which means If I go to maybe 60%, the display might be total dark.
Then, at 50%, the diplay might be as bright as 80% and so on.
Interesting thing is: If I am near 100% (90%, 80%) the display will be relativ bright, and if I am near 0%,
The diplay is relativ dim.

Issue 2: Starting at 100% trying to increase to ‘110%’
The brightness varies, but stays relative bright

Issue 3: AFTER showing the boot logo, the original brightness is not restored.
In the setting->dimmer menu the correct value was saved, but the actual brightness of
The display is just in the scale of the menu value.
And thats the issue why I cannot live with this, sometimes it just starts to dim! I then always
Have to go to settings and so on...

Note:
1. It doesn’t matter HOW I change the brightness (Knob, buttons, Remote), “the bug” is always the same
2. There is no temperature dependence.

Maybe it's a combination of the problems???