Yup, same stuff here. It only occures when looking at the flowing magma in the middle of the fire room, from whatever place.
Also, to avoid Confusion, this is map 04, not 03

(Guardian of Fire it is)
Radeon 9200 SE 64 MB
Directx 9.0
Athlon 1 GHZ
512 DDRam
Proof: (I was playing as the fighter, without dyn lights)

I also tried messing with Open GL display settings on different settings. No help.