I have both and I have had some problems also.
None exactly like yours though.
You have to just live with it untill they put out a patch or another upgrade. You can't downgrade iTunes without completely un-installing it and removing all library files.
I am having the same exact problem. Sometimes a reboot helps and sometimes it does not. Sometimes ending the itunes and itunes helper processes helps and sometimes not. I wish that I had not invested so much time into organizing my itunes library so that I could switch to another program. I anyone discovers a solution I would be most grateful. Thanks.
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