Deleted duplicate thread.
I have tried reinstalling iTunes and the error is still there, and it occurs if Fusion2 is running or not.
If Fusion isn't running, it's not clear that this is Fusion related (it could be a coincidence). If you uninstall Fusion (this won't affect your virtual machines), reboot, and still see this problem, I think it's pretty clearly not Fusion related.
I have the same problem on a PowerBook.
Well since you have the same problem on your PowerBook and Fusion cannot be installed on a PowerBook then I don't see how this is a Fusion issue on your iMac however do as Eric suggested and that will tell for sure.
You also can use the following command in a Terminal to shut down the Services that Fusion has running even when the Fusion app isn't so you don't have to uninstall it and you'd be getting the same results.
sudo "/Library/Application Support/VMware Fusion/boot.sh" --stop