In 7.3, the drop down search box was added. However, I personally would like to see a few options with it.
I personally think there should be a checkbox option for the drop-down search box to only search the forum the user is browsing. In addition, there should also be another checkbox option to display for a user can specify to display previews of the post bodies in the search results. I personally like using that feature when searching, however, it is not available using the drop-down search box.
