Hi Enrico,you added an encoding conversion in lyx2lyx here: http://www.lyx.org/trac/changeset/a0afd345/lyxgit
Can you please explain why this is needed, but not on windows? I ask because this conversion does not work with python 3: All strings, also the ones returned by os.path, are unicode strings in python 3, so if any conversion is needed we have to do it when filling the different members of the LyX class.
Georg