Somewhat similar to:
no menu in dogecoin-qt wallet client
There's no menu for pan newsreader in a 16.04 install literally days old. In this case, unity is working, and pan has always worked sufficiently that I expect this is somewhat new. If this is a duplicate, pardon, a search for "no menu" shows many, many results.
The menu was there yesterday. I restarted the application, but haven't yet rebooted.
initctl restart unity-panel-service
fixed it for me. bug as per that question. duplicate question. – Thufir Jul 26 '16 at 23:49