Just noticed a compile error that I have never seen before whilst optomising my map and wondered if anyone had ever come across it before or if anyone knows what it means.

Have checked the error list here http://www.interlopers.net/errors/ and it doesn't even seem to appear.

WriteBSP...
Warning: area portal has 512 verts. Could be a vbsp bug.
Warning: area portal has 512 verts. Could be a vbsp bug.
done (4)

Can anyone shed any light on it?

I've had the same problem (http://www.dayofdefeat.net/forums/showthread.php?s=&threadid=66385&highlight=512+verts)

I can't remember how I fixed it, I think I eventualy deleted the problem portal when re-optimizing my map. I don't think it causes any problems though.

Thanks for that m8 it's a map i'm optomising for someone else which is never any easy thing to do and having spent the best part of 3 hours placing about 13 area_portals with endless error messages I finally got them to work when I got that error message.

Was about to chuck the pc out of the window but now I know it's not a problem to worry about I can carry on placing the rest of the area_portals that are needed.