Tap into Safari 4's hidden preferences
If this is all too much for you to take at once, and you want the faster rendering and improved standards-compliance without all of the UI upheaval, you might want to have a look at this list of hidden preferences compiled by Caius Durling. Using the Terminal, you can change everything I mentioned above back to the way it was in Safari 3. Want tabs on the bottom again? You got it. And long live the load bar!
[via Daring Fireball]