Comment 7 for bug 969123

Ok, here what I come with :
I created a file using Linux Libertine O, from the repos, with italics and words that should be ligatured. I saved it (ex1.odt), uninstalled the font from the repos, installed the one from Numbertext, and reopened the documents : the font was then some kind of sans-serif fallback. This is shown in screen1.mp4
I changed the font of the document to Linux Libertine G : while it looks globally the same, italics are not handled in the same way (ok, not that obvious), and it now handles ligatures. I saved this new file (ex2.odt) This is shown in screen2.mp4

I think all that proves my point : someone with the Libertine (Open Type version) font from the repo can't read correctly a file sent by someone using the bundled Libertine (Graphite version) font.