The dropbox indicator is not working properly. The third funny looking icon is dropbox.
I can confirm that because this icon disappears after
dropbox stop, and it appears again after
dropbox start or
dropbox start -i.
The indicator comes with an empty menu. It's annoying and useless. While dropbox is still working on the background.
I'm using Ubuntu 15.10 and Xfce desktop.
appindicator1 installed and have tried to reinstall dropbox. The dropbox version is
3.14.7, it seems
3.12.5 doesn't come with this problem.