On the lowest level of Dragon's Eye, you fight a marilith tanar'ri (multiarmed snake lady). I began to fight her then retreated out the door and rested. But when I come back in she's nowhere to be found! I can't beat her if I can't locate her. Is this a bug? HELP!

I did the same thing that you did and freaked out to, but she is still there you are just missing a tunnel somewhere in that area. straight ahead from where you first entered.

Jackyl said just what I was going to, I posted a write up on the Ironworks tip section regarding this.