Got my very first iMac a couple of days ago and its been running great. Only noticed 1 dead pixel on the screen near the top but decided its only 1 and it doesn't bother me so meh. However today I was writing myself a new CV and noticed when I moved the program from one side (left) to the right side the greys in my document looked darker... So I have looked at some tests and have been dragging items across from the left to the right and notice they do gradually get darker. Example 1 : Example 2 : Is this just something that is unavoidable on such a screen? I remember reading users have issues with iMac displays in the past but wasn't sure if its something that is still on going.