It seems, image redirects are somehow broken. You cannot view history diffs (nothing shows up) and categories won't work in image redirects. Is this bug known? An example is visible at http://test.wikipedia.org/w/index.php?title=File:ARTI.svg, see my edits in the history there. It's broken on all wikis, not only on test. I made my test there, to see whether the the new code to move images activated on test will cure the problem. It seems, it will not.
Marcus Buck