On 11/1/07, david@svn.wikimedia.org david@svn.wikimedia.org wrote:

Revision: 27091 Author: david Date: 2007-11-01 04:08:42 +0000 (Thu, 01 Nov 2007)

Log Message:

Split mTitle into uiTitle and dbTitle; this is explained at the top of EditPage.php.

mTitle was publicly accessible, since it was declared with var and not protected or private. Did you check whether this change broke any other MediaWiki code, or any extensions?