A topic I have read about recently...seems some micro four thirds users have put 30K plus actuations on their mini sensor cameras and are experiencing blurry snaps, banding, and then ultimately overexposed images. Apparently the sensors are failing maybe? One theory is x rays tend to exacerbate the problem....natural x rays and manmade airport scanner ones and the like. The oldest DSLRs and digital cameras are just starting to show their age...many of the compacts fail for a host of reasons not necessarily related to the sensor. I've heard reports of D40 sensors going ballistic. It does sort of make sense that such a precision electronic digital part would have a shelf life. Makes me want to make sure my camera is grounded real good...lol