[>BKA< T Wrecks]

Awww, thanks for the explanations on func_illusionaries and func_walls and stuff. I think I understood you, cause once when I fiddled around with the hammer editor (just curiosity), I wondered how to build a railing, and as the n00b that I was I wondered why these damned bulletholes appeared in thin air - of course, I had made a func_wall instead of a func_illusionary. Clip brushes, tsk, tsk... a science for itself! But many mappers actually release such n00b stuff! Happens with ladders as well, doesn't it? Well, something that looks similar at least - bulletholes in the air.
Ok, so I guess there's no way around that problem - unless you explicitly tell the bots that they can't see from node x to node y, but that would require even more WP flags...
It's not that bad, though. How many maps do you know that feature such curtains? Not many, I'd guess...