Is this a new bug or an old one? ...or is my FF 1.5.06 on WinXP Pro just doing it for fun?

I have a layer with a flash menu with buttons and part of the layer appears over an iframe. The flash menu works perfectly fine on all pages except when over the iframe. The part over the iFrame displays but the buttons don't work. Strange.

Here's a link so you can see: http://www.westernvet.ca/search/

Is this something new? IE6 isn't affected by this. I don't recall having this trouble before with FF 1.0.X but I'm not sure if I tested it on that page going over the iframe. Crazy.

What do you guys find?!

CP