Xbox Live users report Gamerscores dropping to zero, MS aware of the issue [Update: potential fixes]

Some Xbox Live users are finding a nasty surprise today: their Gamerscores and Achievement lists showing up as totally empty — an ironic twist after news of a Gamerscore increase for XBLA games. Tips are pouring in from concerned 360 owners.

Microsoft is already working on it, noting on its support page "We are aware of the problem and appreciate your patience while we implement a solution." Joystiq is trying to determine the cause of today's issue, and will keep you updated as the story develops.

Update: Microsoft says you should sign out and sign back in, and suggests you try re-downloading your profile if the issue persists.