Author: ayg
Description:
Per the summary. This is an issue if, for instance, a namespace was added. On dewiki, when the WP: namespace shortcut was added, at least one user's name reportedly became invalid, and he could not be renamed. This is a major bug when it occurs, because there's no possible workaround without shell-user intervention and it completely disables the account.
This requires going through all the SpecialRenameuser.php code and killing the unnecessary use of titles (which is why I opened a bug rather than immediately fixing it). When is $username going to be different from Title::newFromText( $username, NS_USER )->getText()? When $username is lowercase (maybe), when else?
Version: unspecified
Severity: major