I would really appreciate if someone from nVidia could look into a bug that only nvidia users are affected by when using compiz and/or Unity. this bug has existed for quite some time (over a year) and appears to be caused by a bug / bad behavior within the nvidia driver. I am linking you to the bug report @ lp:compiz (Compiz development on launchpad), which contains details of the bug, how to reproduce it (and avoid it by disabling features in compiz) - as well as many comments/verification from nvidia users whom are affected by this annoying bug.
Here is the link; https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/729979
I am also going to link from lp:compiz to this forum, to allow other nvidia users to weigh in - in the hopes that this may get the ball rolling (towards fixing this bug).
if there is any additional info or help that i can provide- please do let me know.