Just wondered if anyone else has had this issue? Both of my sonos controllers within a couple of months of each other have developed dead patches on the touch screen area. They are now both unusable as they are at the top and bottom where u press 'select album' and 'add to queue' etc. In fact yesterday the controller downstairs came on by itself and switched the radio on in the bedroom, and no it wasn't a scheduled alarm. Anyway, I've emailed sonos so I guess they'll go off for repair. Anyone else had this problem?