You have to edit the CSS file to make it work...

Unfortunately this wasn't the solution.

Basically you should update all files ...

I guess this tip leads me to the solution. Since the early 2.0 RC-versions of MLF I'm updating only that what the changelog shows. This is due to little customizations in some files which I fear to lost in case of a complete update. Quite probable that my MLF is after my selective update procdures in an instable state so I will do in future what you recommend - and jotting down the individual changements better .

Thanks for your help!