Unfortunately we suffered a major failure on our server on Sunday. The hard disk locked up and then physically burned the circuit board:
It's totally unrecoverable.
As Sunday was Easter day, it was not the best time for this to happen.
Additionally, our incremental backups started failing on April 4th due to a precursor of this issue (hardware faults caused system services to fail), and we hadn't noticed. We've therefore lost 16 days of forum posts, and some other data. Fortunately there isn't much major in there, and we have email notifications or other alternate backup sources for most things.
The website is starting to come back up, but we are having to rebuild the whole server configuration, so getting all parts of the website working will still take some time.
Major server failure