Just a note that this is still happening, since the user confirms he didn't receive any notification for this message I sent him: https://ru.wikipedia.org/w/index.php?title=%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%A4%D0%BE%D1%80%D1%83%D0%BC/%D0%A2%D0%B5%D1%85%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9&diff=prev&oldid=65643029

I've tried pinging my test account, and getting my test account to ping my staff account, and neither direction worked. Raising severity level accordingly. I will ask the devs.

(Notes:
I tried with a few namespace variations, just in case. None of the tests worked. https://ru.wikipedia.org/w/index.php?title=%D0%9E%D0%B1%D1%81%D1%83%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5_%D1%83%D1%87%D0%B0%D1%81%D1%82%D0%BD%D0%B8%D0%BA%D0%B0:Quiddity_%28WMF%29/sandbox&oldid=65783394

I did also test at Enwiki, and everything is still working normally there.)

I've explained the problem at https://ru.wikipedia.org/wiki/%D0%9E%D0%B1%D1%81%D1%83%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5_MediaWiki:Signature and requested that the admin revert (or adapt) the change that was made, which broke this.

Note: I tracked down the original discussion to [[ru:Википедия:Форум/Архив/Предложения/2014/08#Изменение стандартной подписи]] - but google translate isn't very clear, and I don't have time to investigate further, or determine what else might need to be done. Hope that helps.

Note 2: Two devs are investigation the use of "namespace aliases", in signatures. (Which currently do not work). If anything changes on that, I'll put a note in Tech/News. Closing

I'm marking this as a "duplicate" of bug 71353, to aid in finding the location where the underlying (3 layers deep!) cause is now being examined.
(Philosophers might argue with me as to whether it's an actual 'duplicate', but 'see also' doesn't seem strong enough. :)

• This bug has been marked as a duplicate of bug 71353 ***