I received the following after a vandal's posting to my talk page was immediately deleted:
this is a notification from MediaWiki that a new thread on User talk:MaxSem, '[blah blah]',
was created on 19 November 2011 at 05:25 by Eat the War
You can see it at <blah blah>
The text is:
The database did not find the text of a page that it should have found, named "Thread:User talk:MaxSem/" .
This is usually caused by following an outdated diff or history link to a page that has been deleted.
If this is not the case, you may have found a bug in the software.
Please report this to an [[Special:ListUsers/sysop|administrator]], making note of the URL.
Enotifs shouldn't be sent in such cases at all, I guess.