Ok, before 7.1 I never had the display issue. What I can see and you can't, is the left hand edge of H and U key (the lettering itself, not the box) is almost bold font and the rest of the letter is normal. Now retina or not, it looks terrible and was never a problem before. I'll do another screenshot. See if you can see what I mean.
Ipad is flawless apart from this.