It seems to be a bug in latest bluez-utils package ... downgrading to bluez-utils_3.24-0ubuntu2_amd64.deb and using gnome-obex-server solves it.
It seems to be a bug in latest bluez-utils package ... downgrading to bluez-utils_ 3.24-0ubuntu2_ amd64.deb and using gnome-obex-server solves it.