Accordion Problems in IE

Hi everyone,
Fistly, let me say that jQuery UI is great work....keep it up.
I am having problems using the accordion in IE. It works perfectly in
Firefox (as usual). My problem is that when I click on a h3 to adjust
the accordion, two h3's merge into each other until you mouse over
them, then they come apart again.
Anybody got any idea on how to fix this?
Cheers,
btd1.