Custom jQuery toggle buttons that work in every browser but IE... why?

Custom jQuery toggle buttons that work in every browser but IE... why?

Here's the scenario:

I've created some custom make-shift toggle buttons using super basic markup, a little CSS, and some jQuery for the animation.

I have a separate script that ties into this one, and uses AJAX to query a DB and update some values, but that's outside the scope of the issue...

The snafu is that these toggle buttons respond appropriately in every browser except (you guessed it), IE. Now I've commented the scripts like crazy, and isolated the problem, but can't for-the-life-of-me figure out how to correct it. 

If you have time, please take a look at it and let me know what you think... this is driving me crazy.

Kyle Smith