Drop-Down Unstable Above Flash Video in Firefox for the Mac

The menu drop-down is functioning well across just about all browsers (Mac and PC) except for the latest version of Firefox for the Mac and I’m not sure why. The drop-down is unstable and hides/appears in brief intervals when you mouse over it.

Any suggestions to resolve this issue? This started occurring after I updated the latest version of Firefox and flash.

My website is here.

It’s working fine for on Mac with the latest version of Firefox (3.6.8).

Off Topic:

BTW, every time I go to your site, the opening riff scares the bejesus out of me!