In our testing, jQuery UI Accordion works without issue in IE7 as it's a
supported browser. Please share a sample page so we can see what you're seeing. If you don't have a site to publicly host one, you can create one on http://jsbin.com/
Here's a fiddle reproducing how accordion has problems with longer content in IE7 where parent container has overflow:auto; set on it. Any ideas or workarounds? Remember to explicity set you browser to IE7 mode as compatibility mode won't repro it.
if you play a lot and clic on 1 and 2 and 1 and 2 etc... a lot of time you will see that under IE the resize of the content zone is not correct ! see the screenshot 35 under IE, you can see the scroller on the right of the content