Version-Release number of selected component:
gnome-music-3.10.4-1.fc20

Additional info:
reporter:       libreport-2.2.2
cmdline:        python3 /usr/bin/gnome-music
executable:     /usr/bin/gnome-music
kernel:         3.14.2-200.fc20.i686
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
notification.py:75:_update_track:AttributeError: 'NoneType' object has no attribute 'get_string'

Traceback (most recent call last):
  File "/usr/lib/python3.3/site-packages/gi/overrides/GLib.py", line 633, in <lambda>
    return (lambda data: callback(*data), user_data)
  File "/usr/lib/python3.3/site-packages/gnomemusic/notification.py", line 66, in _update_playing
    self._update_track(self._player)
  File "/usr/lib/python3.3/site-packages/gnomemusic/notification.py", line 75, in _update_track
    artist = item.get_string(Grl.METADATA_KEY_ARTIST)\
AttributeError: 'NoneType' object has no attribute 'get_string'

Local variables in innermost frame:
self: <gnomemusic.notification.NotificationManager object at 0xb004f54c>
player: <Player object at 0xb003884c (gnomemusic+player+Player at 0x9c5b140)>
item: None