The new version of MediaWiki will hopefully be on test wikis and MediaWiki.org from 20 September. It will be on non-Wikipedia wikis and some Wikipedias from 21 September. It will be on all wikis from 22 September (calendar). This is the version that was meant to go out last week.
You can join the next meeting with the VisualEditor team. During the meeting, you can tell developers which bugs you think are the most important. The meeting will be on 20 September at 19:00 (UTC). See how to join.
Hello, Fluffernutter. This message is intended to notify administrators of important changes to the protection policy.
Extended confirmed protection (also known as "30/500 protection") is a new level of page protection that only allows edits from accounts at least 30 days old and with 500 edits. The automatically assigned "extended confirmed" user right was created for this purpose. The protection level was created following this community discussion with the primary intention of enforcing various arbitration remedies that prohibited editors under the "30 days/500 edits" threshold to edit certain topic areas.
In July and August 2016, a request for comment established consensus for community use of the new protection level. Administrators are authorized to apply extended confirmed protection to combat any form of disruption (e.g. vandalism, sock puppetry, edit warring, etc.) on any topic, subject to the following conditions:
Extended confirmed protection may only be used in cases where semi-protection has proven ineffective. It should not be used as a first resort.
Please review the protection policy carefully before using this new level of protection on pages. Thank you.
This message was sent to the administrators' mass message list. To opt-out of future messages, please remove yourself from the list. 17:47, 23 September 2016 (UTC)
When you edit text and mention a new username they are notified if you add your signature. Before this only happened under certain conditions. 
Users are notified if they are mentioned in a section where you add your own signature even if you edit more than one section. Before, users were not notified if you edited more than one section in one edit.