Comment 39 for bug 729979

"Keep previews of mimized windows" is disabled as it is for everyone in 12.04. If you think it should be enabled, then a proposal enabling it should be made.

I have now tested enabling it, with standard precise AND with this fix backported to precise. In all cases the white windows persist on restore (using Unity).

Note the white windows on restore only happen with Unity. Running the latest lp:compiz without Unity, there are no white window problems. I have not yet tested other combinations, so please don't ask.