seth vidal wrote: >The only guess I have is memory-related errors. > >Have you tried running memtest86 on this machine? Running yum will >exercise memory a good deal better than just rpm from the command line. >If you've got some flaky ram in the system then it could cause this >behavior. (and lots of other odd behavior) > > Hey again, I should have RTFM for yum a bit earlier because running 'yum clean headers' and 'yum clean packages' seems to resolve the problem. Firstly, I removed the 2 troublesome headers in /var/yum/cache manually and found that re-running 'yum update' gave me the same old errors. Next, I removed the 2 troublesome headers AND packages in /var/yum/cache manually and then running 'yum update' succeeded! I would guess that 'yum clean all' would do the job too - but I'm not too clear on what 'oldheaders' means, so I'm not sure if it would remove the headers I want removed ... Anyhoo - thanks seth for your help - and eternal thanks for yum :) pantz -- Before you criticize someone, walk a mile in their shoes ... That way when you do criticize them, you're a mile away and you have their shoes!