mobile

Is anyone else having trouble taking screenshots? Whenever I do it successfully shows that the screenshot is taken and I can view it in my gallery, but whenever I try to share it, it's just a black image. Does this have to do with the screen settings or something? Also if I take a screenshot and try to open it with an app such as Pixlr, it shows the image but it is like distorted with a grid array of black squares. Any help would be appreciated, thanks!