Just bug fixes:
-Deleting posts no longer messes with timelines, which caused actions to statuses to affect ones below them, or crash.
-Similarly, depending on the order statuses in a thread would load, actions like delete, favourite, etc. could also be done on the wrong status.
-It's no long possible to mash the send button and accidentally send multiple posts or reports in the composer and report page respectively.
-Tag pages, account, and threads can no longer load themselves infinitely.