Last modified: 2012-05-03 02:42:39 UTC
Calling Special:PermanentLink without id redirects to id=0 with defaults to the main page. Giving a message like 'Notargettext' on Special:Movepage is nice.
patched with r101478 pending code review.
Tagged for inclusion in REL1_18.
That did not get merged in 1.18. Will be available with 1.19.