While debugging another module (the Interwiki extension which says in the table of interwiki links "edit this page" instead of simply "edit), I found what looks to be an old message string text bug in the core OutputPage.php:
In OutputPage.php public function output line 942 seq. I found
if( $wgUniversalEditButton ) {
....
title' => wfMsg( 'edit' ),
....
'title' => wfMsg( 'edit' ),
I am pretty sure that here twice 'editthispage' was originall meant (but pls. review and correct me, if I am wrong).
Remark: compare with Skin.php function editThisPage which uses the correct message string "editthispage" is used.
Version: 1.16.x
Severity: normal
URL: http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/OutputPage.php?view=markup