Last month, it seems right after the last patch Tuesday in March, I started experiencing a strange shake in the screen when I held the Surface by the bezel (usually at the bottom, in landscape mode, with my right hand and my thumb just beside the start button). When I am on the start screen, all the tiles jut shake erratically. When this happens, sometimes I see 5 erratic dots right where I was holding it, just above the bezel. In either case, as this happens, the Surface is basically unusable. At first, it seemed that by merely removing my grip, and holding the screen another way, the shaking (and the dots) would disappear, and I could proceed with normal usage. However, it seems it has gotten worse. At times, when the shaking starts, it does not stop unless I turn off the screen, and turn it back on. And now it seems to happen no matter how I hold the device. Also, this behavior seems worse when I have the touch cover attached, and folded back while holding it in tablet mode. It is very frustrating! At times I can't prevent the shaking at all, and have to restart the device, or stop using for a while. It doesn't appear anyone on this forum has seen this issue. I searched the Microsoft help site and a few seemed to be experiencing this as well. One person said this behavior miraculously stopped occurring on its own, while another said, after they contacted Microsoft, they just sent him a new unit after his was returned. Has anyone else had this issue? And do you know if it is a hardware issue, or perhaps something that can be fixed with a firmware update? By the way, today is patch Tuesday for April, and I already updated my device. The problem is still there. Although it does seem to do it a bit less. Any help will be greatly appreciated. Thanks Oh, yeah, one more thing. I had my device since October 26th, 2012, and use it just about every day.