I just got this phone as a replacement for a 928 that I loved, but dropped one too many times and knocked a few things around in the casing. Basically I couldn't use the power button to do anything, and it would randomly try to turn off, or take screenshots, because the power button must have been pressed by some loose parts in there or something...
Anyway it is a GORGEOUS phone, huge step up from the 928 (and I really liked the 928). However, I have the screen color gradient issue. Does this go away with time? It's white at the top and becomes purplish towards the bottom. It's most noticeable in the mail app and other things with light backgrounds.
Also, something I haven't seen mentioned, is when I press the button to lock the screen, it sort of flickers first. But it doesn't seem intentional... I don't know how to describe it. This might be normal and I've just never noticed before, but it's a little distracting.
I think for both of these issues, as I use the phone they won't matter to me anymore. I'm going to try and ignore them and just enjoy the phone. I really hate nitpicking but it's so hard not to do it when we spend so much time (and money!) with these devices.