I'm happy (I think) to have found this topic. I too am having some troubles with sharing a notebook. I am a Premium Member and my wife has the free account. I created a notebook and shared with her via the desktop client. She is accessing via the web client through Chrome on a Windows machine. Sharing permissions were setup to by inviting her with the sharing functionality in the app and to her email. Her permissions are set to "Can Edit" She was able to join the notebook and can see the existing notes. She cannot edit existing notes within the notebook. She is able to Create a Note, but then cannot edit that note. She can delete the notes she has created. When I look at my activity in my account, I see the number of "Untitled Notes" that she creates and deletes. Any thoughts on the matter are appreciated. Thank you.