I have just noticed this mark on my head unit display, right at the edge. I am positive that it was not there previous to today. It a very circumscribed mark, not random. I've put a few pictures up. The display is clearly seen behind and also when text moving past it. I did think the LCD was started to delaminate, but I'm confused as the display seems to work perfectly. It's not a mark on the glass as it's perfectly smooth when you run your finger over it, so it seems it's something behind. Unit works perfectly normally. Anyone any ideas??