Maybe this was pointed out when the original update was added but I did not find any discussion of it. It's not an issue with Calibre at all but a bit of confusion over what one is really "buying", or more accurately not buying, with an ebook.
I was catching up on the list of changes in Calibre and noticed the following:
It's a minor thing but even without DRM I have yet to find a TOS/EULA which allows one to resell an ebook
purchased, even from Baen. So to say those are books someone "actually own" is just a tiny bit misleading and incorrect in all but maybe a few isolated cases.
It's a minor thing and people who know enough to use Calibre are likely to
not know what the truth is. However as more less technically inclined being to use Calibre and read your changes log there could be some unfortunate inferences all pointing back to that comment.