It's not that, and it's a unique problem I've only had with loading certain levels. It's as if the BSP tree was "shifted" over. I can still walk around, but the collision is shifted...
Hope you understand. If not, then i can post a FRAPS vid...
Now that I think about it, it might )somehow) be the player action? It's custom, and does not close when "my" handle is terminated. Since it uses the same "player" handle, could the function still be running?