A friend of mine told me that she could not save and delete attachments inside memos received from Internet, right-clicking on attachments icons, as she usually did before I installed Notes 8.5 .
Oh well, maybe because she uses Notes 8.5 for MAC? ;-)
Or because there's some Notes policy applied to her Notes account?
No, that's a problem for all Notes 8.5 clients, as stated by this technote...
Unfortunately the recent Fix Pack 1 doesn't solve the problem.