I was also very dissatisfied with the sharpness of my photos to I took the camera back to the vendor and he tested it. Finally agreed with me and it went back to Canon for repairs. Should get it back in a couple of weeks. I'm really anxious to see if it will get repaired or what.
Thanks for responding to me. For all I know I have the same problem but with the advice given to me by the fine folks here at Hedgehog I am getting around it by using other options on this camera. This camera is considered inexpensive these day at $300 but it is a highly rated camera by critics and users alike. Good luck. Let us know what happens when you get it back.