Problem with fullscreen in Firefox

I have followed the tutorial on this site for the fullscreen flash page. However, even when I use the available download code with the tut, it is having problems in FireFox. It cuts the top and bottom off of the movie and puts it centered on top without margins. It works fine in Explorer and Safari.

Does anyone know of why this may be happening, and how to fix it.

Oh, I also have the CSS code in the head tags too…

I’m running Panther on a G4 Powerbook