New DarkPlaces build posted, has a variant of jitspoe's lighting fix, and a bunch of collision fixes, and a fix for the bugs in r_useportalculling that occasionally caused a black screen.
jitspoe - I had to fix the bounds checking on dsi/dti to be no more than lmwidth-2 because otherwise it could read out of bounds when sampling right at the edge, which USUALLY won't crash but I wouldn't count on it, so it willl interpolate right up to the edge but won't fetch past it.