Dell UltraSharp 2007WFP 20.1" S-IPS LCD Monitor Wide

If  you are a Mac user, this monitor is a good IPS display technology  alternative to buying an Apple Cinema Display. These displays calibrate  nicely, especially if you are using the System Preferences / Display  Calibration Assistant in Mac OS 10.4 Tiger or Mac OS 10.5 Leopard.
The  Apple & Dell IPS LCD displays don't have external contrast  adjusters. With the IPS LCD, there is no contrast adjustment on the  display or in the Mac OS. It stays in the right contrast all the time.  Only Brightness and RGB levels can be adjusted externally as well as  selecting PC Mode and Mac Mode. So with Tiger and Leopard, the contrast  is about right so that I can begin the calibration process, starting  with adjusting the External Brightness Control on the monitor to get the  black levels to match, in System Preferences / Display Calibration  Assistant.
But in Mac OS 10.6 Snow Leopard, the  default-fixed contrast setting is too bright in the black and shadowed  areas, so it's impossible to manually adjust the brightness to get the  black levels to match in System Preferences / Display Calibration  Assistant. So, all of the monitors' external controls are functioning in  Snow Leopard but Snow Leopard's new default brightness is beyond the  Dell monitor's external adjustment range as it is with most older Apple  CRT displays and most other non-Apple third-party Mac-friendly LCD  displays.
So this monitor is great for calibrating with  Mac OS 10.4 Tiger or Mac OS 10.5 Leopard but Snow Leopard will render  this monitor un-usable. It's almost like Apple is treating all third  party-non-Apple displays like "Jail-Broken" iPhones.