As long as we're suggesting changes to 3dnj's map, here are a few glitches I caught:
I would suggest disabling vertex lighting on these cabinets. For some reason the cabinets do not play well with vertex lighting.
This grate texture. Is it custom? If so, I recommend editing it so that it's antialiased like the dark one. It kind of disappears at a certain distance otherwise.
This face (and the others like it) should be aligned to Face so that the texture doesn't stretch out.
This one isn't a glitch; I just wanted to point out that the hot-air balloon was a nice touch.
Actually, come to think of it, the amount of fog on it is a little harsh. Is there any way to override it? (like with the skycards)
There seems to be an issue with uniform lighting here.