I was just mucking around in Safari and discovered something that I didn't expect - though perhaps I should have.
I was deleting all of the Apple-supplied bookmarks in the toolbar. I started then to edit the name of one of my links, and messed up. So I pressed Command-Z and it fixed it. I pressed it again, and it started to add bookmarks back into the toolbar that I had deleted! Not sure how useful this is, but thought I would share it with others.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030221164440355