[CentOS] x11 update problems

Hello,

I had a power outage during a 'yum update' and I think something may have gotten corrupted in the
process.  Trying to run 'yum update' again gives the following errors on the most recent x11
packages:

Error: Missing Dependency: xorg-x11 = 6.8.1-23.EL is needed by package xorg-x11-Xvfb

I've tried removing /var/yum/cache, and various yum and rpm command line options for these 2 and
other x11 packages, but can't seem to get past this.

Does anyone know how to re-install these latest x11 packages?  I'm running CentOS release 4.0
(Final).

Thanks in advance, and let me know if there's any additional info I can provide.

~Rick


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