If you visit this site with Firefox 3 (a beta, or an RC), on a Mac, you might not see any scrollbars…
Sorry for the inconvenience, but after a look around, it seems the culprit is a meta tag I’m using.
<meta http-equiv=”MSThemeCompatible” content=”no” />
The MSThemeCompatible meta tag is supposed to be for IE only (though old-skoolish).
I tested it on another site, and indeed when I remove that particular meta tag, the scrollbar reappears.
Hope they fix it before they’re having their release party!