Weird and weird. The cause: I was trying to speed up the forums; it turns out we've been accumulating huge heaps of empty database entries whenever someone read a forum post. Ugh. So I changed it to a delete command, which apparently (for some terrible reason) had a permissions check in it, one that apparently doesn't work very well. Not a feature I'd actually used before.

I've removed that permissions check (as it was inconsistent with how other live data manipulation functions work), and probably fixed the typo that was causing it in the first place.

(My PM inbox does actually work here; I was just spectacularly busy before.)