All of a sudden , it is impossible to create new directories within the Assets dir by using "files and images" ....

The file / directory rights are okay (the apache user has full read/write rights) , and it _is_ possible to add files or rename already existing directories. I can also delete existing dirs.

Silverstripe does not produce an error; it just kinda' hangs (ajax process never stops)....

This is a big problem for us, since it impairs my clients work bigtime...

Anyone experienced this before ?