CC, I asked for opinions - don't apologise. Both you and Trigger have been very honest. I think Nicky would agree in usual circumstances but overall Pumpkin is an affectionate and seemingly content kitten; and with regards to doing what a "normal" kitten can do - well to her this might be normal. If she's been this way since birth then her way of life will be this so she won't know any different.
Nicky wanted to see if anyone out there could cope with such a special little girl before making a solid decision, which I think is the right thing to do. Pumpkins current fosterer is caring for her well.
MKR, they don't know enough about her to know for sure what happened, unfortunately. I think that would make the decision a lot easier for Nicky.
Thanks, Janey and Bazsmum.