Forum:What does this mean???

I'm in the Lawful Quest, and I just killed a basilisk as a monk (with gloves, of course)and I get a weird message:

"You kill the basilisk! dmonsfree: 1 removed doesn't match 2 pending Program in disorder-perhaps you'd better #quit."

It sounds like theres an error with my game, but considering that the Lawful quest has strange messages, I'm not sure what to make of it...