Yes I had the same after just about 12 mths only.
Also was causing the same trip fault, not nice before 7am and a whinging partner to content with (and no electric).
Im same as george, solved for the moment at least by "drying out the machine". (somewhat ironically)
Some relief at least by pinpointing the dryer was the culprit to tripping the RCD, something of an annoyance to be honest.
I'm not sure about extended guarantees as they can be a bit of a false economy (if the machine won't last 5 years without it, it's not worth getting another the next time around either).
Tony
January 2009