By adding the following line:
user_pref("browser.display.use_document_fonts", 0);
to ~/Library -> Application Support -> Chimera -> Profiles -> default -> xxxx.slt -> user.js, it will force Camino to display web pages with font settings in the Preference panel, as opposed to the fonts specified by the page itself. To reverse the behavior, change the 0 to a 1.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030506235618331