Menu bar Firefox problems!!!

Help.
My Firefox browsers' menu bar (the bar with file, edit, view, history, ect.) frequently will not drop down on top of a firefox window. Please check out the picture...this is so annoying.

http://picasaweb.google.com/oceanfirehawk/UntitledAlbum/photo#5133984294259081042

Found the problem

Whoa! Get this...if I go on stage6.com and watch some videos on either my wife or my macbook...that menu bar problem starts up. It doesn't happen any other time.

Funny, on my PC ... I press F11 to enable that in FireFox ... gives you more browser window real estate on smaller screens.

Not sure why it's intermittently doing it for you though.