I haven't found an easy fix for this except to remove the fieldset entirely. Setting the field set to
inline-block will do the trick, but at the sacrifice of having your fieldset automatically stretch to the width of the container.
I've tested this in Firefox 3.0 and Firefox 3.6 and the problem exists in both of those browsers. It does not seem to happen in Firefox 4 or any of the other rendering engines like Webkit or Opera.f2富二代官网入口