We've had four original Kindles in the family. First two for the kids and second two for us adults. Of the original two, the daughter's screen failed first. Despite being in a leather case, we think maybe putting something down on it. Lines on the screen. Amazon were great, replacing it quickly. The replacement failed last week, probably for the same reason. Now the second of the original Kindles has also failed. Same symptoms. This time, it was under a low bed and we think our son lying on the bed must have touched the screen. Unlikely you would think, but it was at Pontins, Brean, and the beds are terrible. Now I know these are inexpensive units, but the screens do seem unreasonably fragile. Anyone else had problems?