In the browser compatibility section of the documentation, it says: "Any problem with them should be considered and reported as a bug in jQuery." So, here's something really, really odd.
Going to http://jquery.com/test/ on FireFox 184.108.40.206 (Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:220.127.116.11) Gecko/20061204 Firefox/18.104.22.168) reports 2 tests of 306 failed, but only lists 88 tests on the screen; number 77 is red, all others are green.
On Internet Explorer 7 (7.0.5730.11) the tests don't even complete, and the test web page is diverted to http://diveintomark.org/ -- no clue what that is about. Could this be some test page you try to pull data from?
Can't find a version number for JQuery.js - the file is 19,285 bytes in size. Believe it is v1.1 (the file is dated Jan-8-2007).