Wererat fell asleep. Coup De Grace attacks on it bypasses it's DR making it possible to kill a wererat easily with normal weapons.

I suppose it makes sense, thrusting your sword into it's gaping, snoring mouth. But just thought I'd inform you guys for safety measures.

Makes sense to me. Don't think it ignored the DR, just blew right through it, I imagine.

Even tough cookies can only take so much.

I'm going to hope that we can just pass this one off as a feature, rather than a bug. :)