I just want to add that the bug mentioned in the post by Tiximei has been fixed with the latest update (at least) from this ppa: "http://ppa.launchpad.net/ryzom-isv/ppa/ubuntu saucy main"
Ubuntu users with the recent update can access apartements, guild halls and other rooms without problems.
Ubuntu users with the recent update can access apartements, guild halls and other rooms without problems.