Hi, I'm new at using tablets and android. I have a 7 inch tablet that uses android 4.0.3. I installed GO Launcher EX from the market to personalize the display, which was fine the first day I used it. But now there's a problem... In the stock home screen, the wallpaper normally slides along as the screen is swiped. But after installing GO Launcher, that feature failed--first, in landscape orientation and then it also happened in portrait. The problem got worse when I changed the wallpaper. If I tilt my tablet from landscape to portrait, the wallpaper was cropped badly, with a black area at the bottom. I uninstalled the GO Launcher, but the problem also occurs in the stock home screen. Please help. What should I do to fix this?