Please describe the problem:
The workspace-switcher deskbar applet does not allow adding workspaces on a second X server (separate monitor).

I have have two monitors, and I have setup two separate X servers (using nvidia-settings, Xinerama is off) so each monitor has its own workspaces.  On the first monitor (:0), the workspace-switcher applet works as expected, but on the second monitor (:1), I cannot add workspaces.  Ubuntu defaults to 2 workspaces, and whenever I change the number of workspaces on monitor 2 (:1), it changes the number of workspaces on monitor 1 (:0).  I have Compiz enabled on an nVidia FX 5500 (if that matters).

Steps to reproduce:
1. Get two x servers running on two monitors using nvidia-settings, without Xinerama.
2. Enable Compiz (easy to do on Ubuntu Hardy Heron), and the desktop cube.
3. Attempt to add/remove workspace on second monitor (:1) (using workspace-switcher on that monitor/x server).


Actual results:
The number of workspaces on the first monitor (:0) is changed.

Expected results:
The number of workspaces on the second monitor should be changed.

Does this happen every time?
Yes.

Other information:
I have an nVidia FX 5500, if that matters.