I agree with Olaf here - the pictures don't appear to have shake, they either have a focus error or a bad sample of the lens. Don's lovely squirrel shots can be a bit misleading since in some of them, he is inches from the squirrel, and it is too easy to compare a large clip from a frame with a tiny 100 per cent of a more distant subject (this is a permanent web page viewing problem, and I often wonder how many non-techie folk see 100% views and fail to understand what that means - it could mean 100% of the picture, we happen to use the term to mean 1:1 pixel viewing).
View this - it's a screen shot showing a snap taken by Ailsa's boyfriend Colin borrowing the A900 last week, very dark conditions under trees at the zoo. 70-300mm SSM G wide open at 300mm, 1600 ISO, 1/100th. The focus is correct and the magnified part shows what the lens should resolve - every whisker clearly. But, Colin also took many other shots at 1/50th, 1/80th etc where the squirrel had moved or camera shake was not corrected by SS, and most were not sharp. But they were not blurred like your samples are, you can see the movement rather than a soft blur.
David
