Hmmm.... you're right. That looks kind of odd. My first thought would also be to enlarge it, but you said that didn't help. Have you tried using a different font? Is this font PostScript or TrueType? Do you have AntiAliasing set (I can't even remember if you can turn that on or off in OSX). Just trying to brainstorm.... These are the things that come to mind that I would check if it was happening to me. Can you get the same thing to happen with other fonts? If so, what are the similarities? When I tried my own page, everything was legible.
**Are you using the style palette to make the font bold, italic, etc instead of using the actual Bold or Italic version??