Common skin warts (also called cutaneous warts) are raised round or oval growths. A wart may be lighter or darker than the skin around it. Some warts may have tiny black dots in them, often called seeds. The dots are small, clotted blood vessels. Warts may occur alone or in larger groups that merge and form patches.
According to Canon (link):  Canon addressed the âfeedback loopâ in later model IS lenses by introducing an algorithm to the IS detection system to automatically recognise when the lens is mounted to a tripod.
Canon's New PowerShot TX1 Digital Camera Packs Best-Of Breed Imaging and High Definition Innovation into One Do-It-All Device This increased sensitivity at the top-end allows the cameras to utilize faster shutter speeds, significantly reducing the effects of camera shake and subject movement during hand held or low-light photography.