Hi Craig, > On XP, i1Match from GretagMacbeth/XRite seems to use a LUT loader > utility that runs on startup. Does XP have a facility to do this > automatically that they're just ignoring? My impression is that Windows does support the VCGT tag inside a monitor profile at all. Maybe someone else can confirm this? So, any monitor calibration or profiler application under Windows needs to do this housekeeping task manually. That's probably why GretagMacbeth uses a Startup Loader, Monaco Profiler uses its own LUT loader, Fuji ColourKit uses its own LUT Loader, ColorVision uses its own LUT loader and so on. So, for Argyll, it is dispwin. Dispwin seems to work under Vista for me. > As for Vista, I would not be all that shocked to discover that display > profile LUT loading required a WCS profile.... Well, hope that you are wrong :( > Craig Ringer Roger Breton