I vividly remember buying a pretty expensive ($450, if i remember correctly) 3 Megapixel Canon S400 camera from circuit city back in 2004! and now for less than half the price you get twice a better camera.
Anyhoo - my aging camera has begun to limp. Just after few minutes of use the batter dies. I have two lithium ion batteries and its the same with both. Also once in a while i do get memory card error. Its unlikely that my battery is dead, but it might be something which this post points. So i’m going to try and reset the internal battery for the camera, if that fails my default plan is to contact Canon.