You will probably need to supply a compatibility diagnostic. The login screen should be appearing correctly, and yours is showing that the stylesheet is not being applied correctly. This can happen for a number of reasons, but I normally see it when browser windows get bogged down or the internets is being slow. In your case, it should all be local, so it is highly possible you have some other software on your computer that doesn't want to play nice with the latest update to Inner Space.

http://isboxer.com/wiki/Diagnostics