An article over at macworld discusses the anti phishing features in the new safari.

"The release of Safari 3.2 on November 13 displayed Apple’s penchant for cryptic release notes, as the company describes all three versions as featuring “protection from fraudulent phishing Web sites.”

Let's decode that for you: Safari 3.2 offers an entirely new anti-phishing feature, enabled by default in the “Security” pane of Safari’s preferences. When you try to visit a site that’s “known” to try to attack you, Safari stops and warns you with a pseudo-dialog box (in a Web page window or tab) about it."

Read more: http://www.macworld.com/article/137094/2008/11/safari_safe_browsing.html