As one of the users to have problems with weather sealing, can we investigate what the term means. For a start, what is it about the lens on the left that makes it 'weather sealed'? The rubber skirt alone, or anything else? Also, what does the body do to keep out water and dust? Here's why I'm asking: I'm going to have to learn how to be more careful with this camera, so understanding the weak points should help us all keep these great cameras working.