I have the error message "This acccessory is not optimized ..." constantly displayed every 2-3 minutes. There is no sign of water damage. regarding water damage i read that there is a marker which turns pink or red if there has been water damage where as i can honestly say the only thing that looks like a marker is a solid white. I am travelling away with work next week and will be out of the UK for 2-3months so it is essential that i get a replacement. What are my chances of an issue like this getting a straight swap? will they have reserved stock for replacements? as i dont want to be told that my 45 minute drive was a waste of time and that they will send me a new one when they receive one... your opinions?