Now fixed, see https://bugzilla.mozilla.org/show_bug.cgi?id=364188
<div style="border: 1px solid red;"> <div>This should be in the red box.</div> <param> <div>This should be in the red box too (but breaks in Firefox 2.0).</div> </div>
<div style="border: 1px solid blue;"> <div>This should be in the blue box.</div> <table><tr><td><param></td></tr></table> <div>This should be in the blue box too.</div> </div>