It's gone back now and WEX have said they couldn't find the details of me buying it from them,
even though I had shown them the receipt when I left it with them

.
After another phone call and three lost day's they have agreed it is a warranty job and Fuji have agreed to replace the sensor.
I don't know if they realize how bad things like this are bad for their business but I have Slagged off both
WEX and FUJI to any body and every body I have spoken to.
Infact it's Panamoz and Canon for me next.
