I logged in today and was shocked to see that my rep went from 7000+ to 5925 and post count from 621 to 614 for no apparent reason. But I did not lose any PMs, posts, or rep messages.
There were claims that the same thing happened last summer (but I didn't witness it myself as I was on vacation at the time), and it was caused by hackers who fucked with this board. Link:
http://www.rapeboard.com/showthread.php?t=27467 - explanation in post #13. The only difference is that some PMs, posts, rep messages were erased at that time.
To hell with the hackers if it's them who did this crap again.