It is my fault. I took it down last night to take pictures for this blog (argh!) and I put it on the couch rather than putting it away on top of the shelf. I also just stuck it in the bag, I did not fasten the bag. So when H went to put it away on the shelf, his hand slipped and the camera toppled out of the bag.
What a stupid stupid mistake (of mine not to close the bag) and what a shame. I am so sorry. I know there are much worse things that could happen, but that camera brought us a lot of joy. And it will be very expensive to replace.