to my surprise the lightmaps got totally messed up...
here is a screenshot of the map in glpro399:

and here is the same map in DirectQ 1.3:

this map is compiled with QuArK's ETP map format, using BJP's tools.. I don't know if that has anything to do with it but, i figured i'd report it for the same may happen on other maps..
(btw, don't mind the difference in brightness in the two screenies since i used pulsating lightstyles, they were always gonna be different. However do note the messed up light maps..)