When you say you re-ran the scans and all found updates, I think you are saying that on the second go-around you did not get any errors, correct? If that’s the case, I would just monitor and see if it happens again. I have never heard of this type of thing happening, and I doubt that it is related to too many systems, though out of curiosity how many are you talking about in the single group? Considering that you are experiencing a few weird issues (mentioned in your other postings), I suspect these are all related to your specific environment. These are very out-of-the-ordinary problems.
-Doug