Tomorrow, users with banners turned on will notice a change to the banner layout in Web Mail. About a year ago the main banner on the Inbox page was moved from the top of the page to the right side of the page. At the time that move was made, 15% of our users were running an older 800x600 display size on their computer, and those users benefit from the side placement. There are fewer of those users today, but it is now being put back for two other reasons as well. We now think it is more intrusive on the side for most users, after having it for a while and getting feedback. And, the banner industry is fickle and they are moving away from that skyscraper style now, and they prefer the top placement again.
There were no other changes in this release.