Comment 18 for bug 862171

The behavior I get is:
 - remove the "launcher" icon from the launcher
 - run the app
 - switch around on the same window with several apps
 - icon will go away in both the launcher and alt-tab screen
 - subsequent restarts of that app will fail to put a icon on the "launcher bar" until the next reboot.
  - run libreoffice again and it will go back to the app running

The app is running "in the background", but not visible/accessible via alt-tab or on the launcher.