I'm having a similar problem.
Most of the text is showing up, but not all of it. For instance, I can see the text that should be there in the screenshot you've taken just fine, but I can't see a great deal of text on the following screens or when I get into a game. My install didn't hang and the only stability issue I've had so far was when the game defaulted to using the integrated graphics chip rather than the graphics card. At the moment, it looks like this:
http://i.imgur.com/B4QIVRU.jpg
PC specs: Win 7 64 bit, i7-2630QM @ 2ghz, 8gb ram, Nvidia GT540M.
It's also particularly laggy, but I imagine that's more to do with the fact that it's a very early alpha than anything else. I've run the validate files check, restarted steam and rebotted the computer. No joy so far.
