I also run an own Mediawiki, but the problem is that many browsers do not encode
the brackets correctly if you copy and paste the URL.
Actually only Firefox/Seamonkey seems to do it right.
The correct link URL for pasting into a mail:
The URL displayed in the browser, and copied by most browsers:
The problem now is, that many mail clients (such as Outlook Web-App) won't
recognize the ) being part of the URL and just will open
on click - which does not work of course.
So this might be a failure of most browser or mail clients - but can this be
solved via Mediawiki?