The 952 error can be caused by many issues - one of which is the passwords being shadowed - however, I would never recommend unshadowing your passwords because it is such a serious security threat. If you proceed, let me know if it fixes your problem - if not, there might be other solutions - but I strongly urge you not to monkey with the shadowing. I would give you examples of MAYBE when this would be ok but you would have to check (now and constantly monitor) several exploits that this would enable and make sure that your box is locked down.