Hi,
I popped onto 1.bzflag.game-host.org 5155, and I found myself being able to run into buildings and pop onto the top. I didn't have to jump or anything just run into a box wall. It wouldn't work for pyramids or anything. I'd make a video, but I uninstalled fraps.
Edit:
Reconnected, rebooted, tried 2.0.5, same thing.
-Tanner