Have anyone found their PlayBook that seems to have darker colors at corners of the screen? Looks like discoloration or inconsistent back light.
I just had my Playbook replaced, the original had yellow tinge at left and right side of the screen. My replaced set doesn't have yellow tinge but I noticed dark corners on the screen, like vignetting effect.
I'm considering to send for repair again, but if this is a common PlayBook issue, then I'll keep it. Considering that I'm lucky to not have dead pixel. Touch wood!