Comment 28 for bug 872207

* I have upgraded through several versions were this problems is present (persist).

* I have manually removed all compiz settings files (e.g., when 3d unity crashes) removed all compiz libs with apt and reset/rebuilt compiz - at various dates/releases.

* I have enabled transparency at some versions. Though deleted settings (etc operations) between releases.

Very unlikely to relate to upgrades - if the problem is in compiz.

Unlikely to relate only to transparency settings since I have reset unity and compiz completely at times - after upgrades.

Not sure exactly when it started to happen for me.. prob. some time during the late 10 or early 11 version

. great work Doug :-)