Hello,
We are holding the deployment of MediaWiki version 1.28.0-wmf.19 due to a couple of bugs that have surfaced.
The first one is that renaming a user was blocked [T145596]. Reported by K6ka, triaged by MarcoAurelio. The issue is fixed now thanks to Aaron Schulz and Kunal Mehta.
The second blocker is way nastier. I have pushed the upgrade to group1. matanya (a long volunteer with a lot of technical patches) immediately reported the infoboxes on the Hebrew Wiki were on the wrong side, which prompted a rollback. [T145673].
Timo Tijhof and Kunal Mehta have found the root cause. I can speak for them as to who/when we will get a solution.
For now. I am holding the train. Will reassess tomorrow and ideally push group1 at 19:00 UTC then follow with group2 at 20:00UTC.
Stay tuned!
Up-to-date status: https://tools.wmflabs.org/versions/
MW-1.28.0-wmf.19 deployment blockers https://phabricator.wikimedia.org/T143328
[T145596] Renames getting stuck on mediawiki.org (Sept 13, 2016) https://phabricator.wikimedia.org/T145596
[T145673] 1.28.0-wmf.19 broke template RTL placement https://phabricator.wikimedia.org/T145673