Continuing on from the Linux/Mac Versions thread:
I and others have experience issues with the Options app, where setting graphic settings dosen't make a difference in-game, quality always seems to stay at low.
Also, for me at least, I've been able to change resolution and fullscreen or windowed, but no other options are used in-game.
Another interesting thing is that I removed the config.ini inside the game directory and it never came back.
One other behavior I noticed on my system is that the settings are being saved in the configuration app somewhere, but the game itself dosen't use them. I set the graphic preset to medium, save, and launch the config app again, and it is still medium. Then switch it to high, and it is high the next time I launch the config app. Still, the game dosen't use any of these settings.
So maybe the config app is saving in the incorrect location, although not sure why resolution options work.
For the libGLEW dependence, have you considered bundling that with the game, or possibly making it work with the newer versions of that library? Linking to the one that is included in Steam didn't seem to help. The error about it not seeing the library went away, but the functionality stayed the same.
I didn't see any errors in the console when I ran the config app manually.
Here's the config log: http://pastebin.com/WGub2V3M