Both jabberd-2.0.9 and jabberd-2.0.10 give problems if the user/group 'jabber' allready exists. I worked around it by commenting the stuff. But somesome suggested strongly to report the bug, so... :) More info: http://forums.gentoo.org/viewtopic.php?p=3286857 Hopefully THAT will help someone :))
*** This bug has been marked as a duplicate of 130849 ***