Odd synching activity

Question

As issues go, this ranks pretty low (so far), but I thought I'd post it anyway and see what anyone else has encountered.
When I plugged the iPod in this evening, instead of updating the podcast and the two songs I'd added in the last week, it proceeded to update about 1200+ songs that were already on the iPod. These have been on the iPod and in the iTunes library for months with no change. To test it out, I disconnected the iPod, added a track to iTunes, and resynched - no problems, it updated the one song, and finis.
I have updated iTunes (to 5.0) since the last time I synched. Any connection? I may have changed the genre on a few (a dozen or two at most) tracks since the last synch, but certainly not that many (and I actually don't think I did).
Again - iPod and iTunes seem to working fine, so not a major issue, but I was curious.

Answer 1

So I figured out my own problem.
The odd drive activity was the CD drive, not the hard drive. I had a windows-burned cd in it, with no title. The system must have been wondering what it was, and thus looking at it every so often. I got rid of (most) of the screen delay by running the cleanup tasks through macJanitor. I had previously modified my crontab so they ran at much nicer times, and was unused to having to run them manually.
Hope this helps someone,
Trekkie