Unity application switcher displays gray question mark icon

[Barry Warsaw]

For some reason, Unity's tab application switch is now displaying a big gray question mark for Emacs24, where it use to display the nice purple circle E w/pen. I suspect the problem began with this changelog entry:

emacs24 (24.3+1-1ubuntu1) saucy; urgency=low

  * Merge from Debian, remaining changes:
     - emacsVER-lp725988.patch: Set the X EMACS_CLASS to "Emacs24" to please
       bamf and gnome-shell.
     - debian/emacsVER.desktop: Also set StartupWMClass for bamf and
       gnome-shell.
     - Have emacs24-common Depends on emacs24-common-non-dfsg, now that it
       is out of multiverse. Update debian/copyright to match.
     - debian/control.in: Use libtiff5-dev in place of libtiff4-dev.

 -- Dmitrijs Ledkovs <email address hidden> Mon, 03 Jun 2013 10:28:00 +0100

But Dmitrijs is unable to reproduce the problem.

The icon shows up fine in Gnome Do and the Launcher, and is broken in the application switcher regardless of how emacs24 is started (shell, launcher, gnome do).

Mystery.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.