Comment 1 for bug 1390833

What I suspect the problem here is:

When you copy your page the system checks to see if you have access to the artefact (which you do as they are your artefacts) and if so adds it as an attachement to the new page's note artefact.

But when another user copies the page the it checks the artefacts and says they don't have access to the artefact so doens't copy/add them to the new page's note artefact.

What I think will need to be done is to check the permission of the artefact in relation to original note block and page it was on.