If your Kindle Keyboard 3G has a hairline crack running diagonally downwards from the bottom corner of the screen to the edge of the casing, it's a very common fault.
It can cause the screen to completely freeze up months down the line. If you are then out of your warranty time, you're stuffed. If you're within warranty, get Amazon to change it now, even if the device is currently working.
Hoping to prevent this giving anyone else the 