Apple Recommends Against Vista, For Now
Apple spokesman Derick Mains said, “Although iTunes 7.0.2 may work with Windows Vista on many typical PCs, Apple is aware of some known compatibility issues and recommends that iTunes customers wait to upgrade to Windows Vista until after the next release of iTunes, which will be available in the next few weeks.”
So if you’re on a PC and are for some reason using iTunes (why aren’t you using Foobar?!), and have been eying Vista, you might want to heed Cupertino’s warning and eschew the upgrade for a little longer.
Apple to Windows iTunes users: Don’t install Vista yet [CNET]