Please describe the problem:
The interface for registering and receiving gnome media player control keys (play, stop, next etc.) was renamed when gnome-settings-daemon was split from gnome-control-center. The interface is now at  path=/org/gnome/SettingsDaemon/MediaKeys; interface=org.gnome.SettingsDaemon.MediaKeys

From dbus-monitor:
---------------------------------------
method call sender=:1.37 -> dest=org.gnome.SettingsDaemon path=/org/gnome/SettingsDaemon; interface=org.gnome.SettingsDaemon; member=GrabMediaPlayerKeys
   string "Rhythmbox"
   uint32 0
error sender=:1.1 -> dest=:1.37 error_name=org.freedesktop.DBus.Error.UnknownMethod reply_serial=15
   string "Method "GrabMediaPlayerKeys" with signature "su" on interface "org.gnome.SettingsDaemon" doesn't exist
"




Steps to reproduce:
1. ensure that you have the most recent gnome-settings-daemon installed (2.21.90 or later)
2. run rhythmbox and monitor dbus exchanges with dbus-monitor
3. press any of the media player control keys

Actual results:
no response from rhythmbox to media keys
error message in dbus-monitor output (see above)

Expected results:


Does this happen every time?
yes

Other information:
I'm running rhythmbox version 0.11.4 on Mandriva Cooker