Comment 2 for bug 823488

I experienced this issue in 12.04 LTS 64-bit with compiz cube enabled.
using the indicator worked fine, but when I moved screens using anything else (workplace switcher, keyboard comands, or the "cube", the indicator did not update the desktop number and eventually the entire desktop froze.

Unistalled indicator-workspaces, disabled compiz cube, re-installed indicator-workspaces.
Everything works fine, no problems using the indicator, workplace switcher (from launcher), or keyboard shortcuts. Indicator changes value as expected.

Let me know if you need additional system info.