Yeah, I just ran across that myself as a matter of fact. I validated a replacement of I, Robot and had the same thoughts. There were a couple of errors that I corrected, very minor, but then I have seen an error here and there in e-texts, like though instead of through, etc. In the case of I Robot, I did validate it, but the idea that you have is good I think, to put your suspition of it in the comments field. Wish I had thought of doing that myself. Pam