http://bugs.winehq.org/show_bug.cgi?id=21030
--- Comment #1 from Jeff Zaroyko jeffz@jeffz.name 2009-12-16 03:31:44 --- That means it doesn't exist. You're accessing an app that was removed. Looking at the history it had no test data associated so it was removed. Submit a new entry and test data.
If there is a bug at all, it is that deleted apps don't return 404 not found.