Ran into this same issue when I tried to uncheck the Enhanced Zoom Desktop plugin (which didn't seem to be serving any purpose as all the internal settings are set to 'disabled').
Got the same results when I installed ccsm and tested the same operation on a clean install under VirtualBox.
Only fix I could figure was to 'rm -rf .gconf/apps/compiz*' to blow away my settings. Just changing the settings back does not appear to work for all plugins.
Ran into this same issue when I tried to uncheck the Enhanced Zoom Desktop plugin (which didn't seem to be serving any purpose as all the internal settings are set to 'disabled').
Got the same results when I installed ccsm and tested the same operation on a clean install under VirtualBox.
Only fix I could figure was to 'rm -rf .gconf/ apps/compiz* ' to blow away my settings. Just changing the settings back does not appear to work for all plugins.