Shortly before upgrading from Kubuntu 13.04 to 13.10 I had gotten the multimedia buttons on my keyboard to control Banshee using the instructions in the following thread:

http://ubuntuforums.org/showthread.php?t=1282099

After a "semi-clean" install (I retained my Home folder) and re-installing many of my programs, it no longer worked. I have tried deleting the "Banshee" group that I created in "Custom Shortcuts" and recreating it, but that still doesn't work. What should be my next step?