Last modified: 2014-07-20 23:17:09 UTC
See https://en.wikipedia.org/wiki/XKeyscore and its navbox sidebar, expand its 'Programs' section and you'll see a redirect 'X-Keyscore' which should be bold because it is on linked article.
This doesn't seem like a logical change to me. Linking to a redirect which redirects to the original page again is probably hardly ever done on purpose, but happens by accident, e.g. because the user presumes an article on a related topic to exist - which then turns out to be described in the article the user is editing, hence the redirect - , or because articles might be have been merged. The solution clearly should be that users fix such links/redirects, not to confuse people by seemingly random bolding of words. Additionally, if links to redirects to the current page remain clickable redirects, it's easier to still access the ?redirect=no page in order to change it into a real article, when desired.
See also bug 16562.