You are spinning information. I went to the article in New Scientist and it said that adult stem cells are safe unless they have been stored too long. Nothing strange about that. I wouldn't eat a sandwich that had been in the refrigerator for eight months either. Research scientists will have to accept that they are not "creators." Only God can create.
Not stored too long, allowed to replicate too many times. And that is an inherent feature of many types of potential stem cell treatments: start out with a handful of cells and set them to multiplying until there are enough for the treatment.