Network Manager Disappeared From System Tray

[wjbmd48]

Hi:

I've now encountered the same glitch on install of Lubuntu 16.04.1 64-bit on two different systems:

Everything runs smoothly, including the appearance of the network manager in the system tray. I then install a bunch of programs in synaptic, the usual suspects: libreoffice, chromium, wine, thunderbird, etc, after which the network manager disappears from the system tray, which now appears as a weird little white box with a thin square inside. I'm still connected to my wireless, but it's disconcerting not to see my connection status.

I've tried the usual: nm-applet (not a 64-bit app?) and sudo service network-manager restart, but no joy.

Any ideas?

Thanks!

Bill

[wjbmd48]

PS: I'm also not seeing dropbox in the tray either, which is running, so it has to be something wrong with the tray, not network manager.