Tried the suggestions, but still a problem. I tried creating a new gallery and I can create it but once I insert it into the post it becomes uneditable. It appears to act like a picture that can’t be edited. After I’ve inserted the gallery, if I go back to the media library, the gallery is not there and I would have to create it again. I’ve tried this on two of my sites so far and I’m getting the same results.
I saw that there was another complaint about this by someone before the 4.0 upgrade so it might not be specific to 4.0 but other than that, nothing has changed. The problem literally happened from one minute to the next because I was working with a post that had the gallery before I updated and then after I updated, I could no longer edit the gallery.
I would appreciate any other ideas I can try. Thanks!