Both my wife and I sync our iPhones on the same computer (Win XP). We do share a couple of apps, but not many. Now, every time I try to update an app through the app store on the phone, it prompts me for her password and then tells me I have to buy this app as it was originally purchased with my ID. I've tried logging out of the store and logging back in, but no luck. Anyone seen this before? Any suggestions?