I just received two Touchpads, one for my wife and one for me. The issue I have is that each unit has a different color tone. The best way for me to describe it is to say that one Touchpad has a warm color temperature and the other has a cool setting. On the stock background, the warm one has darker blues and purple, the other one has significantly lighter blues. The brightness is set the same on both units. Has anyone seen this before? I'm not sure which unit has the correct color.