Canon Powershot A650 IS is one of the recently launched powershot series camera. This camera came along with A720 IS (the one which I bought). There is a service note from Canon today on A650 IS.
Canon has identified a light leak affecting a limited number of its Powershot A650 IS cameras. The affected cameras have a zero as the fifth digit of their serial numbers and Canon have pledged to repair them at no charge via their local factory service centers.
More details over here.