[jQuery] Weirdness in IE

[jQuery] Weirdness in IE


Ok, such a vague subject, but I don't know how else to describe it!
When I use this function in my site:
$(document).ready(function(){
    /*$("h1").after("<hr class=\"thinDivider\" />");*/
    $("h1").after("<span class=\"thinDivider\"></span");
});
it does weird things in IE. Like, when you move your mouse onto the
browser - it's like it add's padding or margin to the attribute that
was just added.
I've found that if I add a: <div>, <span> or <hr /> it does this
weirdness.
If I add a

it doesn't.
Example: http://dd-management.com/dev/TC/dual-diagnosis.asp?sub=co-occurring-disorders