Comment 4 for bug 807141

It is not just Conky that is affected. Sometimes the Dash stacks behind an active application window, for example, Firefox.

I had stopped using a "Natty quasi rolling" PPA a few days ago and initially thought that fixed things (as well as other issues like the Unity panel randomly dying), but in the ensuing days, after reboots, the stacking problem is still going with the default Natty versions of Unity and Compiz.