External link to file page: http://commons.wikimedia.org/w/index.php?title=File:Army_flag.gif&redirect=no (works for me)
Wikilink to file with
[[:File:Army flag.gif]]: File:Army flag.gif (blue link and works for me as a redirect)
Testing three other recently moved files below. First a wikilink with colon in front and then attempted display without colon. In all three cases, the link is blue and works, the display is red and doesn't work for me.
Testing a file moved longer ago below. This time it works for me. The link is blue and the file is diplayed.