Well, yes, I just saw this (again) after updating calibre. I have seen it fairly often, probably most often when there are a batch of files to be updated or installed at once.
I think the errors are what johnmart talks about in his reply. I can't replicate the problem right now--everything is updated as of this afternoon. If there is a problem with
calibre, I will probably never know it, since I have no e-book reader. (Don't know why I have calibre, actually--maybe at one time I thought it would allow me to _read_
e-books on the computer, but I don't think it does. Correct me if I'm wrong, please.)
As I said, I can't say that I've seen any bad result of these "errors"--if indeed they are same. But it does seem odd that it would be reported if there aren't any. Is
it possible that Synaptic is reporting errors that it also corrected?