1. Reinstall App world by going to
http://www. blackberry.com/appworldusing the Browser.
2. Camera; Try rebooting the device by removing the battery. If that doesn't work, try updating the device software to the latest. You can find the latest in the stickies at the top of this forum. If that doesn't do it then it's likely a hardware problem and most likely not much can be done without a hardware repair.