MessageCache::loadFromDB() explicitly excludes all pages with slashes, so messages like [[MediaWiki:Editnotice-0-Foo/bar]] are not loaded regularly. Although it is possible to force the message in the cache with ?action=purge, it is not very convenient to do this every day.

So it would be nice, if you could replace the slash with an other character (perhaps '\'), so you can use the message [[MediaWiki:Editnotice-0-Foo\bar]] to specify a custom edit notice for [[Foo/bar]].

Version: unspecified
Severity: enhancement