I’d say it’s some kind of script error/IE quirk.
I did run it through the Firebug profiler and it came up with this request returning a 404:
GET http://www.floridapancake.com/createprofileforms/undefined?year=
At least you can disable your scripts temporarily and see if the problem persists. If not, then you know you have to look into your js. Then just start re-adding function by function until it crashes again, and you’ll be much closer to the root of the problem...