Ok people lets back up some of these so called claims with *hard* science not just *opinion*.
Here is my claim to hard science.
There are two common graphics formats that are LOSSLESS ie. they don't introduce artifacts. They are bitmap (BMP) and portable network graphics (PNG).
Edit: JMorton also pointed out TIFF format which is also lossless and for which I am grateful to him pointing out my omission.
From the PNG official home page
they have a link to an image
(59Kb .png) that shows all 16M colours.
For those with an 8890 or an attached CRT of recent vintage you will be able to see a smooth transition across the image (btw don't stare at it too long, your eye and brain will start to see changing colours and extra lines - it is caused by the small movement in your eye/head and your retina's rods and cones getting overloaded - and don't anybody tell me any different. I don't want to have to start another thread about colour perception, the physics of the eye etc etc etc. Short of you having a major in physics and opthalmology (anyone care to offer, we want hard facts not guesses) you will not win.
For lower spec screens such as my Toshiba's which only does 64K colours you will see small boxes where the LCD has to do a colour step. For screens with 262K colours you will see smaller boxes of colour step.
The reason CRT's can display this image properly is because the input to a CRT is analog not digital. The RAMDAC's in the 9600 Pro are 400MHz @ 10 bits per channel (look it up if you don't believe me) they can put out an analog signal with 1024 different voltage levels. On the CRT end you are totally analog so you are concerned with the accuracy of your amplifiers, capacitors and resistors which then drive the guns of the picture tube. Given you will lose 1.3 bits of voltage level to noise, jitter etc etc (do the hard science guys - read the data sheets on RAMDACs) you are still within the 16M possible colour specification.
If you care to read thru the PNG website they cover all this in great depth, backed with hard facts and hard science, not just hearsay.
Bottom line a PNG file displayed on the 8890 will display without banding or other artifacts. If you are seeing banding etc with another image, it is not your 8890 LCD nor is it faulty ATI's drivers (if they were at fault you would get banding with the PNG file above). ANY banding is due to poor image processing of the image prior to it being displayed on the 8890 screen.
If anything, the down side of the 8890 screen is that it is TOO good. Other screens just gloss over (so to speak). The Sharp LCD screen in the 8890 is *brutally* honest. Why do you think when they take "celebrity" or "studio" photos the photographers use softer lighting and special filters. It is to soften the edges. On the other hand why do doctors use specially designed lights in an operating theatre that increase the contrast, brightness and clarity? They need the fine detail to stand out.
Short of any one *needing* UXGA, the SXGA in the 8890 is the best LCD, period (I just put on my asbestos suit to ward off the imminent flame war
Here endeth the lesson.