Problem: Inexperienced users are breaking their documents.

Proposed solution A: Change the "Import" command for all so that it  embeds instead of links.
Proposed solution B: Change the UI to clearly show the difference between linked and embedded images.
Proposed solution C: Add a popup that explains to a new user what linking vs. embedding is.
Proposed solution D: Allow a preference to "always embed"
Proposed solution E: all of B, C, and D

Concerning Solution B: Notice that the current UI show a difference : in the status bar, "Embedded" or the path of the image are written. But I'm ok to say that it's not clear enough.
In this status bar, I would propose to not talk about *Image* but to always talk about *Embedded Image* or *External Image*