Well, I've tried every tool that was suggested and I still can't narrow it down. Here's what's happening: I created an "add to cart" button that puts an item in a shopping cart via AJAX without leaving the product detail page. It does the back end insert, and then returns in the right sidebar area the item(s) in the cart along with the total. In firefox, it works perfect the first time and every subsequent click adds another item. Ie ie6 and ie7, it works perfect the FIRST time it gets clicked, adding the item. the 2nd and subsequent clicks, nothing happens. So, something must be happening to the scripting from the return result set. The only thing i'm changing on the form or the button is show/hide the "loading.gif" next to the button. Thats it. nothing else in the form area changes. I'm getting no errors of any kind in any browser. I'm absolutely stumped. Has anyone run into something like this with IE and ajax before? I have a feeling there might be some cache issues or something that i'm totally neglecting to look at. Thanks!