I'm seeing numbered lists show up to the left of the margin. I'm fairly certain that it isn't a quirk of my system, having confirmed in multiple browsers on Mac, Windows, and Linux.

Numbered lists are broken in:
Safari 1.3.1 on Panther
Firefox 1.0.6 on Panther
Explorer 5.2 on Panther
Safari 2.0.something on Tiger
Firefox 1.0.something on Windows XP
Opera on the 770 (they don't appear at all, but work fine when visiting other mediawiki sites).

It does look correct in a recent Internet Explorer on XP. Also if you look in the history tab of the page I linked to yesterday, you'll see that RemoteUser has changed one of the numbered lists to a bulletted list with the comment that they aren't rendering correctly.

Mike