After installing my own Debian package on Ubuntu using Ubuntu Software Center, instead of my icon it will show a question mark will shown in the Unity-Launcher.
After the system was rebooted the icon will shown correctly.
But how can i update or reload the icons of the Sidebar, that the user gets the right icon direct after installation?
Update: unity --reset does solve the problem with the question mark, but i search for that part of this command, which only updates the icons in the Launcher.