I got same errors on FC 4 without UPDATES

, like zimbra folks say they support “FC 3” right now out of the box then they are right
1) If you are using FC 4 then follow this thread instructions..
Fedora Core 4 how-to
if you using FC 3 then give more information if its a clean minimal install what you have on it. and try updating your system using: yum update
2) your permissions errors are coz you missed "-"

when you logged in as root you did
[root@localhost root]# su zimbra
above is not correct
you need to do
[root@localhost root]# su - zimbra
then you will be in zimbra user bash shell and your zmcontrol commands will work..
...if you update FC 3 or FC 4 using YUM
try uninstall ( ./install.sh –u )kill all zimbra services if any running and do fresh install
Raj S Vrach
i2k2systems.com