hey,
that's gonna take me about an hour to download (i'm on wireless internet)...
if it's not emitter related, and it's an interior of some kind, i'm sure the path tracer is having problems finding a lightsource or something.
place some emit portals in your scene..
since there's no MLT yet in this scene, light shining trough small apertures is hard to find without portals...
(check the manual for info on portals)
greetz,
radiance
PS: i'm downloading it anyways in case it's not the problem...
