Holiday travelers, beware!  According to the Telegraph UK, airport X-ray scanners are rough on Kindles:

Electronic ink screens use thousands of tiny capsules filled with magnetic black and white particles to display text and pictures.

It is controlled by applying a small voltage across the capsules, which sends either the positively charge white particles or the negatively charged black particles to the front. They stay in place until the next time a voltage is applied, which allows the Kindle battery to last for much longer than in gadgets that use LCD screens, such as the iPad.

“A static charge from an airport scanner could be 100 volts or more,” said Professor Chu. “That could permanently stick the particles to the screen.”

via Telegraph UK