At the moment I am using linked images as page headers (which is a workaround of using header background images), which break when the document is moved.
(File:/// is ommited for clarity)
The following should be sufficient for reproduction:

The document path:
Z:\Documents\Pricelists\pricelist1.ods
The image path (linked):
Z:\Documents\Headers\header.png


The document is then moved from:
Z:\Documents\Pricelists\
To:
Z:\Documents\Pricelists\Export\Partner1\

As the document is reopened, the linked images show the following path (and not the image of course):
Z:\Documents\Pricelists\Export\Headers\header.png



Checking the source, the document uses "../../Header/header.png" which is fine and dandy, but it is not displayed in such manner in the program itself.
While displaying absolute paths for the user, the program internally uses relative paths, which break on file moves.
Either absolute paths should be used or it should be made clear what sort of pathing is used (or, in best case scenario, make both an option).