I've downloaded a few apps thru the App Store and when I went to sync my iPhone to iTunes on my home computer (windows7) I get an error message thru iTunes basically stating "some purchases cannot be transferred because the computer is not authorized". I went ahead and check to make sure it was authorized which it was and I came up with the same problem. One app in particular that this is occurring with is the Wikipedia Mobile app. Any suggestions or solutions would be greatly appreciated!
P.S. This is the first time this has happened. Love the iPhone. Only want to be able to backup my purchases.