Flash content shows in div with overflow:hidden

Hey Everyone,
I am using a coda style layout that has 4 window panes. 2 of the panes contain flash content. The only browsers that are giving me trouble are Mozilla based browsers on MAC. They work fine in the same browsers on PC (FF2, FF3). Does anyone know why the flash content would show in a div with overflow set to hidden? An example of this error can be found on this site, on panel 5, using FF2 on MAC.