Produces misleading deletion notifications (as reported by @Achim55 on my talkpage, it seems to have a similar functionality as the AjaxQuickDelete on Commons). (I don't have this App and I don't find this new feature on the App doku.)
Recent example: [[c:File: 2010 NHK Trophy Men - Jeremy TEN - 8750A.jpg]] was tagged, and the notification landed to non existing: [[c:User talk:David W. Carmichael]]
Other example users (admin rights needed):
[[c:Special:Undelete/User talk:Sayem Hoque]]
[[c:Special:Undelete/User talk:Self]]
[[c:Special:Undelete/User talk:Tiit Hunt]]
[[c:Special:Undelete/User talk:Rodolgo Venegas]]
[[c:Special:Undelete/User talk:A Certain White Cat]]