I've dug a little deeper, and it seems this bug is a very annoying bug. It has been caused by distributing a corrupted tutorial 3 with Beta 4. I have fixed the corrupted file and commit it to the beta 4-rc branch. All releases will have to be changed with this new map file, including windows, debian, the tarball, and everything else.
This must be done ASAP
-- Extra cheese comes at a cost. Bradley Arsenault.