There are a lot of people saying their displays have no yellowing at the bottom and that the default colorLCD profile doesn't result in an overall yellowish tint. My theory is that most of these displays have the overall yellow tint and that if they are calibrated to neutral white 6500k, the upper part will be crisp white and the lower part will show a yellow tint. Since the default colorLCD profile is slightly yellow it masks the yellow tint of the lower part. So, here is a simple test to see if yours has yellow: - download one of the profiles I've attached and install it in your colorsync/displays folder. Select it and examine using one of the test images in the other thread. Are whites the same at bottom and top? Now, after using the profile for a few minutes, switch back to the ColorLCD profile, or any profile that uses the native white point. What do whites look like immediately after you've switched back?