Hi,

I think I've got this problem, too.

In terminal:

charmed@Inspiron-N5110:~$ rhythmbox

(rhythmbox:5610): Rhythmbox-WARNING **: Could not open device /dev/radio0
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'
Traceback (most recent call last):
  File "/usr/lib/rhythmbox/plugins/replaygain/player.py", line 156, in playing_entry_changed
    pad.set_blocked_async(True, self.rgvolume_blocked_cb, self.rgvolume)
AttributeError: 'Pad' object has no attribute 'set_blocked_async'

(rhythmbox:5610): GLib-CRITICAL **: g_str_has_prefix: assertion `str != NULL' failed

** (rhythmbox:5610): CRITICAL **: deactivate_group: assertion `group->active' failed


I hope I could help.