I have been a beta tester for Google's latest browser for about 3 months. Today it was released for Mac user using 10.5 and it is intel only. If your computer meets these standards I suggest you give it a try.
The browser is fast because Google completly built this browser from the ground up. It can handle pdf's and downloads in a simple straight forward way.
You can search directly from the address window! There is so much more, so I suggest you give it a try,
William aka Hollywood