If you search to back in February/March, you should find a thread describing the differences between the old silver (Minerva) remote and the new black (Mediaroom/Optik) remote.
I think it is in the first few pages of this thread:
http://www.digitalhome.ca/forum/showthread.php?t=120132&highlight=remote+mediaroom
I think it is in the first few pages of this thread:
http://www.digitalhome.ca/forum/showthread.php?t=120132&highlight=remote+mediaroom