After recent update to 14.04LTS the dropbox status icon was gone. The installed version of dropbox is 2015.10.28.
After reading http://askubuntu.com/questions/732967/dropbox-icon-is-not-working-xubuntu-14-04-lts-64 I decided to use the option of editing /usr/bin/dropbox.
I added the line
os.environ['DBUS_SESSION_BUS_ADDRESS'] = ""
after the “import os” line.
Also of note is the dropbox command line interface. Simply type dropbox at the shell prompt for more info.