So glad to have seen this, my cat just started doing the same thing! My boyfriend thinks it's because my daughter wets her bed and the cat smells it so she goes poop there. She does not pee on my daughter's bed though. I am going to try a new litter box, this one is old, but we keep it clean, will try a different litter as well though we have always used the same one. I had wondered if it was because she just had kittens, because she never did this before their birth, and that's the only thing different...my daughter has been wetting her bed at night for a long time, the cat always slept with her before she had the kittens and never pooped on her bed. It is just so strange-and time consuming to change and wash the bed sheets and comforter every time!!