ctrlfreq, you need to have "fixed" somewhere in there, otherwise it centers horizontally in FireFox, not vertically.

ctrlfreq's will do the same thing, it all depends on how you have your page set up.

For instance, the way mine is set up, the CSS is either at the top of the web page or in an external CSS file.

ctrlfreq has the style set up inline, which is perfectly acceptable.

can you give us an idea of how your page is set up?