I recently purchased a galaxy tab 3 7' and have noticed a very slight jump of the screen occasionally. It is very faint, and not overly noticeable, but is a bit annoying when you're on one page for a while, trying to read something for example. It's a very small /quick jump, almost like the screen is refocusing, but is annoying once you've noticed that it is there. I took it back to the shop and they replaced with another but I am having the same issue with the replacement. Has anyone else experienced this?