I have seen strange behavior in 10.5.7 with NVenabler and my color profiles! I am using basicColor Display for Calibration and also can create fine Profiles... But with NVEnabler the ColorSync was very unstable, witch let me went to EFI String Method to install my graphics.
After that I had no Probs with my color Settings. 10.6 and 10.6.1 also had random errors in ColorSync. Profiles changed without any reason, etc. 10.6.2 so far seems very stable and I dont have ColorSync Probs right now! And I still do not use Enabler to bring my graphics to work!