Comment 20 for bug 860375

This problem definitely persists in Ubuntu 12.04 final. "compiz --replace" is the fastest solution. My solution is to create a script that does this:

#!/bin/sh
sleep 5
compiz --replace

Name it something, make it executable, and create a "Startup applications" shortcut to auto-launch it on login.

Lessons learned:
1. Do not try to do this in .gnomerc (which runs before Gnome starts)
2. Do include the sleep invocation, or it has no effect