My IXUS 400 is currently exhibiting a very weird problem whereby if I hold it in a one-portrait position and take a shot it will result in a vastly over-exposed shot. If I hold it in the other portrait position then it will take a correctly exposed shot. This problem always occurs in the same portrait position (ie the camera rotated 90-degree cw and the shoot button on the bottom). I have not dropped the camera ever and always been extremely careful with it.
I would be very grateful for any suggestion/help.