I just saw this section from the Mozilla Corportation's press release:

With Firefox 1.5, Mozilla continues its search partnership with Google in the Americas and in Europe and begins a new search relationship with Yahoo! in China, Japan, Korea and Taiwan.

First, the Google logo and Gmail logo has some changes.

This is last year's Thanksgiving Gmail logo.

This is the '05 one.

7 things the Gmail Team is thankful for this year