Why???
I was/am running kernel 2.6.18-128.1.6.el5
I did a yum update and watched 2.6.18-128.1.6.el5xen and 
2.6.18-128.1.6.el5PAE being installed, with PAE listed first in my 
/boo/grub/menu.lst
I also see:
Installing:
 kmod-fuse                  i686      2.7.4-1.el5.rf          
rpmforge     26 k
     replacing  dkms-fuse.noarch 2.7.4-1.nodist.rf
 kmod-fuse-PAE              i686      2.7.4-1.el5.rf          
rpmforge     26 k
     replacing  dkms-fuse.noarch 2.7.4-1.nodist.rf
 kmod-fuse-xen              i686      2.7.4-1.el5.rf          
rpmforge     26 k
     replacing  dkms-fuse.noarch 2.7.4-1.nodist.rf
This notebook has the atheros wifi mini-pci card.
What do I do at this point?  I have not rebooted...