I have the 550.
I just got a new PVR (Samsung 8030) and when I went to remap the buttons for the remote, certain commands are not "taking".
For example, I want to make my "menu" button to show me my "list".
I changed the commend from menu to list, updated the remote, but nothing happening. Its still giving me the "menu" function as opposed to the new "list" function.
Im having the same issue with the "soft buttons". None of those will "take" either.
Ive never had this problem before and my remote is no longer under warranty so Logitech will not help me.