Have you upgraded to Safari 6, if you're on a Mac the upgrade probably happened yesterday (July 25). the Web Inspector is drastically different. I just spent 20 minutes wondering where "inspect element" went. The answer is that it is a little hand at the right end of the main menu. To see the styles you need to click on the {} in the details sidebar on the right.

There are lots of other changes that I'm just starting to find. the best one is that the address and search bar are now combined like they are in Chrome and Firefox.

What is your opinion of the new Safari on OSX?