There is an auto update now available for 'Street Fighter II’ Hyper Fighting.' Xbox Live users will be automatically prompted to accept this auto update the next time they sign in to Xbox Live with SF:II. When I asked what the update does, I got this from the marketing team:
The title update will address connection and time out issues that have been reported by players. In addition, the Leaderboards will be cleared in order to offset players that have cheated by causing intentional disconnections.
As per Major Nelson's blog.