Everything will probably be OK, when you disable
all "rawhide" , which is for Fedora 12 only.
Menu, System > Administration >> Software Sources,
.. and untick all Rawhide.
Or edit the file /etc/yum.repos.d/fedora-rawhide.repo :
Change all lines with 'enabled=1' to 'enabled=0'
And the same for 'rpmfusion-free-rawhide.repo' etc.
etc., if you have these.
EDIT : Sorry Simon Bridge, writing, while you were posting...
Last edited by knudfl; 09-07-2009 at 09:13 AM.