People usually buy cases to protect their technology. In this case, the $30 case Amazon.com has been selling as a Kindle 2 accessory has apparently been causing cracks in the Kindle where the case clips to it, that eventually cracks the screen. Not good, and also not good that it took a lawsuit to prompt Amazon.com to offer replacements without a $200 charge.Previously, Amazon.com had asked users to pay $200, because the problem wasn’t covered under Amazon’s limited warranty. That led to a $5 million class action