It was pointed out that Opera Mini was broken with the last update. It was due to a couple items: 1) jQuery 2 which removes some legacy support that was apparently needed by Opera Mini; and 2) sessionStorage use without always checking for support. The former was fixed by going back to the latest 1.x series and the latter by making sure there was a fallback everywhere sessionStorage was being used.
Most other changes were minor bug fixes, but some more visible ones include no longer changing the background color when hovering over an item with a mouse and using opacity instead of a background color change to differentiate read and unread items. These changes were primarily to set the stage for upcoming keyboard shortcut support.