I am using a ThinkPad Edge 11. After the installation I replaced Banshee with Rhythmbox. Everything worked fine for 4 weeks but all of a sudden the media keys stopped working.
I need to press and hold the Fn button to use the media keys. I ran
$ sudo showkey
and it shows that I press the Fn button (Code 143) but nothing when i then press one of the media keys (F1 to F9 to be precise). The media keys from F11 to F12 work (play/pause and next track).