ITunes using a lot of CPU

I had been using iTunes for a few hours on my Powerbook and noticed it was using a lot of cpu (about 30-40%) for just playing a song.
I quit the application, and then noticed the following message in my console at around that time:
Jan 19 17:23:16 My-Powerbook mDNSResponder: -1: DNSServiceResolve("My Music", "daap.tcp.", "local.") failed: Client id -1 invalid (-65549)
This looks like it was doing some DNS operation that couldn't be completed?
The application now is working fine after restarting it with the usual sub-10% activity level.
This is iTunes 6.0.2 and the ministore is disabled. Playing was just to local speakers from the local library.
Thanks for any help
Ian

..Step by Step to fix your Mac
They will just say it's a software problem you need to fix most likely.
However if you have exhausted your software fixes and/or Hardware Test gives something, it could be a hardware problem, but likely it's software for what your mentioning.

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Sorry. I did a search, and a lot of threads came up. The one I chose, I thought, explained WHY it happened.
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Of course there could be something wrong in your code. Can you post an SSCCE that reproduces this behaviour?

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..Step by Step to fix your Mac
They will just say it's a software problem you need to fix most likely.
However if you have exhausted your software fixes and/or Hardware Test gives something, it could be a hardware problem, but likely it's software for what your mentioning.

ITunes using a lot of CPU

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