HELP - My Theme Looks Wrong!

I have downloaded Firefox 3, and am using the default theme, but it looks nothing like the firefox you have been advertising. E.g. my back button is the same size as my forward button - i thought they were going to change???? Have I set it up right? I am running XP and my specs meet the requirements.

Turn off small icons

It looks like the default install uses the small icons which don't have the big back button. To change it, go to View > Toolbars > Customize and uncheck the 'use small icons' checkbox.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.