OT but the text selection behavior on this page is fascinating! (Or horrific if you don't want to be nice). I've never seen anything like it.
https://www.dropbox.com/s/4k72g8b2tl3mgzt/Screenshot%202013-...
https://www.dropbox.com/s/4k72g8b2tl3mgzt/Screenshot%202013-...
It appears to be a bug with a combination of the ::selected pseudoelement in conjunction with the font Georgia. My guess is it's a Chrome-on-mac bug (Firefox is fine), not a site coding error.
Disabling either the font or the selection style fixes it. Most likely a text rendering issue. At work we've noticed Chrome getting buggier in relation to that, as well as retaining DOM node properties via redraws.