could you please disable the UbuntuOneMusicStore plugin in rhythmbox and start it again and see if the issue happens again. you are facing this bug https://bugs.launchpad.net/ubuntu/+source/samba/+bug/529714
could you please disable the UbuntuOneMusicStore plugin in rhythmbox and start it again and see if the issue happens again. you are facing this bug https:/ /bugs.launchpad .net/ubuntu/ +source/ samba/+ bug/529714