I had to reset my phone and now it says it is up to date with Windows 7.1. It had Mango on it before I reset it but no matter what I do it won't say there is an update! I've used zune on two different computers! :(
did you try the force update? hit update on zune then count 1-2-3-4-5 and disconnect your internet? i'm asuming your on tmobile. which makes this even more odd considering they even pushed a new update out earlier today.