My apologies. As donatzsky correctly assumed, I haven't checked the site on Windows for a long time. An overwhelming majority of my readers have tended to be on OS X or Linux. But thanks for letting me know. I'll make sure to test on Windows too the next time I do a design update. Cheers!
A simple fix would be to add Consolas as the first font in the list. It looks almost the same as Inconsolata, comes standard with Vista/7 and newer versions of Office (including the "Viewers"), and looks good on both Windows and Linux.
