I've been using a Canon PowerShot A1100 IS camera for the past year and it had been working just fine until I decided to change its settings. After I had serious trouble with it, I reset the settings and thought everything would go back to normal but it didn't. As you can see on the picture, the camera focuses only on the bottom part but not on the upper part. This happens not only with landscape pictures but also with any other type. Do you think this is a setting issue or a mechanical problem?