I've been having database problems. This has been a combination of a bug in MySQL (now fixed, I hope) and an ongoing spam issue (several hundred spams coincided with the MySQL bug). I removed the spams and it cleared up.
What a time to have database issues, though. Live8, G8, Olympic Bid and the London Bombs (when I was in London).
Personally there's been 95% on TMA05 and REM.
I shall have to keep my fingers crossed before I trust the backend fully again, but here's hoping I don't have to reconstruct from scratch.