Time Machine slow backup with Date Validation error?

Console is spitting out this garbage and I don't know what it means
Dec 24 01:17:46 Macbook-Pro mdworker[7772]: Date validation error: EXDATE = '20080626T150000,20080807T150000,20080814T150000'
Dec 24 01:17:48 Macbook-Pro mdworker[7772]: Date validation error: EXDATE = '20071022T150000,20081027T150000'
Dec 24 01:17:48 Macbook-Pro mdworker[7772]: Date validation error: EXDATE = '20080527T130000,20081028T130000'
It creeps along and eventually finishes but if I have a lot of data to backup it takes hours for a few hundred MB. Any ideas?
I've tried starting from scratch and have repaired permissions on my MBP with no luck.
Message was edited by: jgoettel

mdworker relates to Spotlight. Check this thread to see if it helps:
http://discussions.apple.com/thread.jspa?messageID=8372393&#8372393

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