I bought my iPad 4 for about a month. Not long ago I realized that at some points of the frame there are small gaps between the metal frame and glass screen, what I believe to be a rubber that separates the two. When I press a finger closes the gap completely. * The cracks are very small, a sheet of paper can not get into it, and are mostly at the lower edge of the frame. In the other side it is much more discreet. Do not bother me with absolutely nothing, but would not want it getting worse with time. Should I return this unit?