Shoot. I downvoted you jason, sorry. I looked at the site's CSS and I think the problem we're experiencing is due to this site using -webkit-text-size-adjust: none;

The text does not grow in size at all in Chrome for me (while the other page elements do... the text gets squished which gives it some illusion of growing).

I tested it in Firefox 4 and increasing the font size works fine... So, I know you've been downvoted to oblivion but it is at least partially the browser's fault in this case (vendor-specific css extensions).