I'm using Ubuntu 12.04 and I've installed Viber and I'm struggling for days with this problem. My Viber icon is located at the top left corner, few milimeters to the right from the dash icon. I have tried to whitelist it on desktop enviroment variables, it wroked with Skype, but not with Viber. Please help.
Before do this ways, install gnome fallback first by running this commands:
And if the proccess is finish, log out and change desktop environment by clicking ubuntu logo near login field, choose Gnome Fallback and then log in back.