Browser statistics on min font size?

[Erica C.]

I'm working on a site with fixed font sizes. The design breaks (slightly) when viewed in a browser that has a minimum font size set larger than the fonts sizes set in the CSS. What I was wondering is how common it is for users to have a minimum font size set. I looked around for statistics on browsers and font size but couldn't find any.

Thanks for any information!

Erica