I've been using my Time Capsule without any problems for a couple of months now. Last week all of a sudden at the end of the day I got the message that my Time Capsule wasn't accessible any more and that it turned into read-only state. Since then I haven't been able to make any back-ups of my machine. The suggestion was to format the drive, but who wants to lose all data when you don't even know for sure if it solves the problem?After some searching I found this website which describes the problem and also offers a solution (although taking a long time to repair) for the problem without losing your data. Hopefully it can helpful to more people.