Comment 33 for bug 986208

@Lionel: In my case, the dconf modifications works well with fresh 12.10 settings, keeping the scale function available to be activated at bottom right corner. Only after some upgrades did the settings stop working but it went back after reactivation with CCSM and it is persistent across sessions..

Unfortunately, I doubt this is considered a priority bug... Maybe it should, in order to compensate for the fact that, right now, Unity may be a great shell for a lot of people (that's my case), but it provides few customization options, making Compiz/CCSM options really desirable for many users.