I woke up this morning to someone screaming in my voicemail saying their menu navigation wasn't work. i looked and sure enough and IE6,7,8 problem had just cropped up - seemingly overnight.

Nothing wrong in firefox, nothing wrong in safari. i haven't messed with this jquery code in a few days and this had been working as of yesterday.

http://www.jeffersonprep.com is the problem

notice that the exact same problem is not occuring on the demo site I set up on my server http://jprep.matthewos.com even though it's the exact same code.

any help would be appreciated 

jquery ui 1.7.2 on wordpress install on yahoo hosting