Thanks Dave. Heading for work shortly, but will update driver later today and see what happens. Trouble with these things is, as long as they work, which it does printing single sides etc, one doesn't realise it needs an update until you want to do something different like print double sided. As I registered the product with Canon when bought, I do have to wonder why they don't notify you that things need updating, as Apps do on tablets etc? Still we shall see later, not critical or even urgent printing, just a project I have planned that would be better double sided. Thanks again.