How to fix missing Dropbox tray icon?

This will work for versions 12.04 and above in case after installing Dropbox from their site using the DEB package, the icon does not show in Unity.

Remove Dropbox if already installed
```
sudo apt-get remove dropbox
```
Install the nautilus-dropbox package
```
sudo apt-get install nautilus-dropbox
```
In the case the steps above still do not work do the following (This package should already be installed but just in case):
```
sudo apt-get install libappindicator1
```
You will now need to restart Nautilus. You can either logout and then login or simply Reboot the PC.

The end result should be something like:

enter image description here

Tested on 12.04, 12.10, 13.04 and 13.10.

Try this:

dropbox stop && dbus-launch dropbox start

References:

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