I've installed the Safari 3.0 beta, and so far I like it. While I was trying to dissect some CSS - JavaScript, I suddenly remembered I'd read about enabling a pretty neat Web Inspector tool in one of the nightly builds:


So I tried it, and it works perfectly in the public beta of Safari 3.0. Quit Safari, open Terminal, and type:

defaults write com.apple.Safari WebKitDeveloperExtras -bool true

Launch Safari, and control-click somewhere on a web page. You will see a new Inspect Element entry in the contextual menu. Select it, and it will open up the Web Inspector and refocus to the node under your cursor.

[robg adds: You also get the inspector, automatically, if you enable the Debug menu (as has been described here before, and is repeated in another hint today).]