Thanks for the fast answer. The problem appears in every dir after completing a sfv/release. After complete, the dir gets changed to 007. I've also applied the ioninja lib fix which i was missing somehow, restarted ioftpd... but no change.
No spaces or strange characters in the dirnames. No "("... just letters, numbers and dots. But on "site rescan this", the dir attribs get changed from 777 (which I've changed manually before) back to 007 again.
Any more ideas?
Thanks again!