[jQuery] Why do my tooltips slide to the right in IE and are fine in FF

[jQuery] Why do my tooltips slide to the right in IE and are fine in FF


My jTips work fine in FF but in IE7 they are all shifted to the right
by a fixed amount and I dont understand why or have a clue (ha ha) on
how to fix it.
If you go to this page and pass the cursor over the bird Acadian
Flycatcher you will see what I mean.
http://www.whatbird.com/wwwroot/Components/Complete_Search_Tab.html
Maybe someone here can point out something I am doing wrong.
Mitch