I just posted this as a link, but felt it worth mentioning as a hint as well. Dave Hyatt, who works for Apple on the open source WebCore portion of Safari, has a Surfin' Safari weblog online with all sorts of great Safari tidbits! You can read how they've fixed the CSS1 test suite rendering failure, sped up Flash animation, and other neat informational tidbits.
The site is only a week old (of course!), but there's already some great content there. Based on the published notes, it seems that the next rev of Safari will have even more bug fixes and neat features. Keep it up, Dave!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030114141154124