The spawn exit appears to have been griefed on the build server. I have blocked it up with glass temporarily. Unless it's meant to be this way, in which case just ignore me.
Sorry for the triple post - East exit has been blocked off with obsidian. I have removed the blocks for the time being to allow people to access the eastern path
Upon further examination, w8in was responsibe for all of this griefing, but the very person who posted this thread, Globey, also said he was "awesome", so I sternly warned him and w8in said he would never grief again.