After testing around with Fedora Core 4 I realized that I had no possibility to configure the acls. For that reason I just want to add what you have to do if you need/want to play around with acls:
The options in /etc/fstab have to be changed, if you use ext3. You need the options acl,user_xattr to activate acls and extended attributes which are nice for such things like desktop search.
If you want to know more about acls, then check out this nice explanation. Its written by someone of the suse guys, and explains the whole structure very detailed and with good examples.
Just to report: this shown procedure works with Fedora Core 4 and Suse 10 – and it should work with every Linux distribution which comes with Kernel 2.6.x 🙂