Same issues here. I have a flex site where my users can attach files to a table. It's been working until today, as of today when they go to attach they get a fault code 400, lock request conflicts . I can't find answers anywhere, we have service pack 1 installed. It seems to only happen when we attach a file, they can update attributes and even add records. It seems to take longer than an hour for the 'lock' to get released.