Last modified: 2008-07-12 20:50:00 UTC
While this normally shouldn't happen, "operator error" or a broken upgrade can turn MediaWiki: messages into redirects. On various essential items such as the mainpage, badtitle, etc this can completely break the wiki as eg unexpected bad titles crop up. (This caused the problems described in bug 28.) To be safe, a message marked as a redirect should be ignored and the value taken from the Language class. Since redirects can go to non-protected areas, the redirects should not be followed.
MessageCache::loadFromDB has 'page_is_redirect' => 0.