Rather depressingly, my 4 month old S80 has died.
Lens won't extend, nor can I close the cover, so I presume the lens must be about 99% retracted. Can hear some very faint noises, so I guess something has happened to the gearing or drive. Rather a pity, as it took nice pictures, and I was actually likely to carry it, unlike the D70.
I don't think I did anything horrible to it. I may have put it into my pocket with the lens still extended, but all I did then was walk a couple of hundred metres and pull it out again.
Ah, a bit more research shows that it is displaying the e18 error, and that there is a class action under way to do with this.....