I tried tinkering with the HTML for a while, and from what I can tell, the problem is due to the fact that the DIVs you're collapsing contains an explicit border and padding. In your CSS, if you set "5px" to 0 below:
Code:
.popup-box { border: 0px solid #FF6600; padding: 0px; display: none; background: #FFFFFF; font: 10px Arial, Helvetica, sans-serif; width: 118px; }
The problem seems to be fixed in FF. The animation effect is handled by jQuery, so assuming that is the issue, try updating your jQuery reference on the page from version 1.2.2 to the lastest version:
Code:
<script type="text/javascript" src="jquery-1.2.2.pack.js"></script>
And see if that fixes the issue for you. Let me know.
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