When you click the search box in the top right corner, you are redirected to another search page, and have to click the new box before you can start typing your search. It's a little frustrating/awkward for something that is such an integral part of the site.
I believe it's possible to direct the cursor to the search box on the page you are redirected to. This way when you click the top right search and you're redirected, your cursor would automatically be in the new search box and you can start typing.
Just a suggestion!