Last modified: 2012-03-12 08:58:59 UTC
It is a regression after deployment of MW 1.19 as {{GENDER:|}} worked before for message MediaWiki:Watchlist-details on Special:Watchlist
[00:07:57] ialex> Nikerabbit: the problem is that Message::inLanguage() sets $this->interface = false;
Niklas is looking into this today.
See r113223.
Since no comments, assuming the fix is good enough.