I to downloaded the 60 day trial. After starting the program my screen started flickering like crazy. The screen resolution was set at maximum 1600 x 1200. Only after lowering it and resetting it to 1600 x 1200 did the program work. I have 2GB ram and a decent card and processor that exceeds the recommended specs. I have noticed the flickering occasionally when using Photoshop cs2 but nothing like Nikon NX2. The monitor works faultlessly otherwise.
Opened an image in nx2, made a few adjustments and transferred the image to Photoshop cs2 and my PF usage was 1.5GB. Not to clever? Camera raw doesn't come any where near that usage