The last FC 6 kernel errata no longer boots on my x86_64 SMP server.

The last message on the system console:

Loading jbd.ko module

After that, nothing.  No oops.  No errors.  Looking at the init script in the
initrd image, the next module to be loaded would be ext3.ko:

...
echo "Loading jbd.ko module"
insmod /lib/jbd.ko                   # Hangs here
echo "Loading ext3.ko module"
insmod /lib/ext3.ko 
...

I waited 2-3 minutes, before giving up, and switching back to
kernel-2.6.19-1.2911.6.5.fc6.x86_64