The return to normal date button isn't working in the german version.
Only get a blank white page without any error message.
Some wrong varaibles in the german language files?

Yes, it looks like the $lang[RET_NORM] isn't consistant in the editpost.php, modifypost.php and previewedit.php. If you make these the same it should work. Since I don't know German I'd appreciate if you can tell me how you changed them.

Yes, works perfectly!

I changed them to:"Zurueck zum richtigen Datum" the Special Character ü doesn't work. Don't know why. I still get an error message when i try "Zurück zum richtigen Datum"

I could send you all my german language files. Some strings aren't translated at all. A full translation in the german release would be time-saving for all german customers and reduce these errors with non consistant variables.
I'll have to translate it anyway cause i mainly have german users.

Greets
Astaran