Browser resizing my swf

Hi,

I have a stage of 600x400 and in the publish settings I chose this same width and height (with pixels dimension, and scale: No Scale).

And when I load the swf in a browser:

http://mydomain.com/flash.swf

It resizes the swf stage size.

(I know this because I have a value which is positioned according to the stage width/height, and also because if I choose an opaque windowless I can see that it is bigger than I want it to be)

Any ideas?

Am I loading the .swf wrong?