@NiLuJe: I didn't install the version from #311 correctly (copied the .zip instead of the .tgz, forget it

) and now the fading is gone!
@Frostschutz: The fading was not rare, but happened on every new page, and sometimes more than on the page before. A lot of stress for the eyes, it was no longer a pleasure to read.
Now I'm happy with using MiniClock