whats it doing? or not doing? can you show an example of what its doing? i'm assuming its blurry... i dont have a canon, but mine has a mood swing everynow and then. but this camera has been through hell and back..... though it still manages a good one every now and then - usually sport is the best setting on mine unless i have something stable to put the camera on and use the timer...
this was taken with the timer using the night mode with the flash turned off... with the camera propped up on the roof of my car.. any other way and it would come out looking like a Picasso painting..