As mentioned in the previous post, it was just the way the graphics are drawn.
Just realised that extra ‘box’ off the screen is in fact a simulated reflection of the button above. As soon as there is a second row of icons, eg. radio, phone, usb and media you get that on the screen. So, that is a red herring.
I can put a DVD in and I do get the DVD icon as you would expect – and of course it does then play the DVD. (And two button ‘reflections’ drawn as above).
Do I need to get this up to you to take a look?
I do hope I am not just going daft.