Thanks for that, it hasn't arrived yet but I'm pretty sure none of the fixes have been done as the guy I bought it from didn't know anything about them.
Not too worried as I had checked that canon was still supporting the fixes for second owners, but it will be nice to know for sure one way or the other when it does get here.
Tara
As I understand it the problem was only noticeable when firing long sequences of shots at max fps - this may not be an issue depending on how you use the camera.
Phil