In Delphi 2009, SysUtils.pas contains this in line 425:
EProgrammerNotFound = class(Exception);
It was introduced in Delphi 2009, still present in Delphi 2010, and recently got some more attention on the internet.
I think it is an easter egg, similar to "EBCAK" (Error Between Chair and Keyboard), and the skipping of Delphi version number 13.
EProgrammerNotFound
I don't think EProgrammerNotFound is actually meant to be used at all, but since it is there, people will jokingly use it (similar like putting a stray "const False = True; True = not False;" in someone elses sourcecode).
--jeroen