Flash movie scaling in FireFox

I have built a Flash movie, that I have set up in the HTML base to scale to the fill as much of the browser as possible (proportions constrained).

i upload it to my hosting directory, and all works well in IE, scales and runs bueatifully!

In firefox however instead of scalling 100% it seems to resize itself to smaller than the original movie! And places itself top-middle in the browser, as opposed to absolute middle, like the html is telling it too!

I have tried this on a couple of machines, and the result is always the same!

Is there something that i am missing, or is this a goof in firefox?

cheers