Comment 2 for bug 1096314

I'm having the exact same problem when minimizing a fullscreen instance of Remmina.
This started right around the same time as I saw this article:
http://www.phoronix.com/scan.php?page=news_item&px=MTI2MTY

I suspect this might be a regression as a side effect of fixing this bug:
https://bugs.launchpad.net/compiz/+bug/1063690

To test this theory, I just went to "CompizConfig Settings Manager" (ccsm) -> "Composite" and unchecked "Unredirect Fullscreen Windows".

This has (sort of) resolved the issue with Remmina. Now when I minimize, none of the "Unity" components are redrawn until I click on another Window, but I suspect that is a different bug.