it works. Pictures in the file don't break text as I'd like them to but that is easily corrected in LibreOffice with their style settings (and let me tell you that having common style for pictures is just great!).
This works. But when I try to "Save as odt" from browser, I don't see any images in new 'Some page.odt' file.
I've unpacked both 'pic.odt' and 'Some page.odt' files (since odt is simply a zip) and they both have images inside them but markup around images in 'content.xml' is different. Can anybody advise me on how that comes to be? I thought nslave used mw-render?