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This is the only thing keeping me from leaving LastPass for Dropbox Passwords. I want to be able to share passwords with my partner.
On a family plan, we have both private and shared data. It would be great to have both private and shared passwords too. For example, we have separate, private passwords for professional websites and such; but we share Netflix, Amazon etc passwords. We have separate password storage but it is annoying to have to maintain duplicate (non-normalized) passwords for Netflix in both of our private areas.