Has anyone had issues with their screen flickering and black lines? Today when I put the iPad down flat with the keyboard onscreen and it flickered rapidly until I touched the screen to make the keyboard disappear. This happened in the Ebay app. Last night when I was in Safari scrolling there were horizontal and vertical black lines that created a box area that would move with my scrolling down the page. This started happening 3 weeks after purchasing this expensive device. Did a restore today. Will see what happens. Is this a software or hardware issue? Any feedback would be greatly appreciated.