From a usability perspective, your download button could be better. It doesn't download right away (which is fine), but redirects to downloads/win for me. Might be nice to have it auto-scroll to the win downloads since it took me a while to figure out what was going on.

Here's a screenshot from Win7 32-bit: http://i.imgur.com/2RT6u.png

That random pink line makes it unusable for me.