ITunes uses lots of CPU time when idle

When iTunes is just sitting there with my Music Library displayed, Activity Monitor shows it's using a pretty consistent 22-25% of CPU time. I look at Activity Monitor once in a while and I've never noticed this before. I don't know if it started when I upgraded to iTunes 7.4.2 or not. Other Macs I have access to use close to 0%. I have repaired permissions, checked the hard drive, and waved the other dead chickens over it without any change. Obviously this soaks up a lot of machine resources. Any clues or ideas would be welcome.
Steve

Never mind, I figured it out by myself. On this particular machine I had a 3rd party plug-in installed (SRS iWow 1.1.8). Removing that brought the CPU usage down to 0.1%. Usually I don't install 3rd party add-ons. This would seem to be a good policy.
Steve

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