I observed this today on an RHEL4 system, and it applies to Fedora also. I don't understand why this occurs - is it a security feature? Eg. # touch /tmp/example # chmod 4755 /tmp/example # ls -l /tmp/example -rwsr-xr-x 1 root root 0 Jul 25 19:39 /tmp/example # chgrp bin /tmp/example # ls -l /tmp/example -rwxr-xr-x 1 root bin 0 Jul 25 19:39 /tmp/example If anyone can shed light on this for me, I would appreciate it. Cheers, Ben