When on www.fox.com, on the top navigation bar, there is a menu "shows" which drops down a list of all of fox.com's shows. There has been a recent regression (a week or so worth of nightlies) that now only shows the very top of this drop down. This site renders as per usual in FF/IE.
This regressed between r29414 and r29428 - probably <http://trac.webkit.org/projects/webkit/changeset/29425>.
Bug 17164 is probably a duplicate.
This bug is fixed by the patch for bug 17164.
*** This bug has been marked as a duplicate of 17164 ***