Why is F11 so fucked up while F10 was perfect?

[Gert Jan Mul]

Why is F11 so fucked up while F10 was perfect?
Nothing works anymore as it should.

-Images are not loaded in evolution even with the proper image loading
settings.
- some images have like 16 color schema instead of the proper 256 or
more, and there is no setting to be found that can change it,
- video files don't show properly, they crash or stutter.
- settings are changed back after a next logon.
- other settings often have no effect at all
- printer no longer works and no proper settings to be found.

and the list goes on, and on and on...

and I cant find any clue on the net what so ever.
I totally curse F11.

Gert