I've broken two Kindles within the last two weeks. I have no idea what happened - both times just took them out of their cases to find the screens damaged.
I got my first Kindle 3 years ago, and replaced it after I accidentally threw it down the stairs (that was unquestionably my fault) about 9 months ago. I'm normally very very careful of my lovely kindle though... just don't understand what I'm doing wrong.
Kindle support are AMAZING. They're replacing it free of charge (again!). And they didn't even tell me off! I do carry it around (inside its case) in my bag - but that's normal isn't it? Don't know how much more careful I can reasonably be...?