|: Any idea what caused it?? If not, then I'd expect it to happen again.
I do not expect it to happen again soon. Well at least unless my hoster has suddenly become very unreliable.
The cause probably is that exchanged the hardware and botched up when transferring the data. The files where just assigned to the wrong owner. This should not happen until they change the hardware again and I hope they have learned how to do it properly till then.