Camera just shut off for no reason. Canon said it was cleaning sensor, but must replace whole CMOS chip. Only 4 months old. no charge of course but I read several of you had same problem. I believe this is an issue that will come out. I hope they can find a solution because this is way too much money to be having this kind of problem. I'm getting it fixed but they halve to send part from Japan!! Very annoying and disheartening. Anyone else having this problem and what did you do? Thanks. 7D4me