I have two Eizo monitors connected to my Mac Pro (2x3.2 Quad_core Intel Xeon with NVIDIA GeForce 8800 GT) but can't seem to get the colours to match, particularly in photoshop. They are both high end monitors and really the hardware isn't the issue. They do however use slightly different ways of calibration. The ColorEdge CG211 uses built-in Eizo colour management with ColorNavigator and my Spyder3 sensor. To Calibrate the Colorflex S2231W I use the same sensor with Datacolor's Spyder3 Elite. I am confident that the CG211 is calibrated correctly and that it is producing accurate colours. My problem is that I can't get the S2231W close. I have been through all the calibration settings several times. I am of course setting the same target, gamma and luminosity. The monitor while it is the less expensive of the two is by no means cheap rubbish and has plenty of control, I just don't seem to be able to get it to calibrate close to the other screen. I have managed to get a close visual match of the screens, which I am pretty happy with. I did this by using the RGB gain control on the S2231W. The browser windows on in safari render almost identically. However..... and this is the mystery. When I open an image in Photoshop CS3, then create a duplicate (so I can see exactly same image on both screens) and drag one from the CG211 to the S2231W the colour goes off. The colours actually snap to a different target or white balance as soon as I release the image. So the image looks great on the second screen as I drag it across and as long as I hold it with the cursor but as soon as I release it the colours go. I am not just talking a tiny bit, a really significant amount. Photoshop seems to be doing something to the colours. It doesn't happen with a PDF in preview. Please bare in mind this is happening when the S2231W has been calibrated (which did not match the other screen), but then the monitors RGB gain has been tweaked to create a visual match between the screens when using in the finder. Anyone got any thoughts?