ITunes Corruption after Xcode Install

Hi All
I'm hoping some-one can help.
Up until earlier this week everything was perfect with iTunes and my 2nd gen iPod Touch. I then installed xCode 4.0 from the Apple App Store. Everything appeared to go smoothly. However, now whenever I plug my Itouch in I get the following message:
iTunes was unable to load data class information from Sync Services. Reconnect or Try again Later.
There is then the OK button which I press and synce does take place WITHOUT the normal backup. I then get the following message:
iTunes could not back up the iPod <Name of iPod> because the backup session failed.
The sync has been successful but obviously the backup has had issues and App/tunes etc are all updated as they should be.
I have "Restored my iPod back to factory settings and using the most up to date versions of iPod firmware and iTunes itself.
It obvious that the Xcode 4 install has screwed something up as it was fine before and problematic afterwards. Removing Xcode I don't think would resolve the situation and I do not feel removing and reinstall iTunes would help either (but I don't know).
Has anyone any help they can offer??
Cheers

Just found this, followed it and it fixed the fault for me, and by the sound of it, you have the exact same fault, so i think its worth a shot.
http://losingit.me.uk/2011/03/14/xcode-broke-itunes

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