The overlay graphics look fine. Textures and objects look blocky - like they're rendered at a much lower resolution.
Here's a screenshot of my loading screen which really exemplifies the issue: http://chattypics.com/files/Screenshot000_xqede574jk.jpg (note the outline of a black box - significant?)
Here's a comparison screenshot I found on google: http://diwafernandez.com/wp-content/uploads/2012/04/6-626x350.jpg
Quick edit: the login screen looks/renders fine.