During vacations and travel I tend to use my Nikon D90 and a 18-200 VR (image stabilisation) lens.
I was very annoyed (and had no explanation) when I found images to be unsharp, which had be made in wide (20-30mm) and very fast shutter times (1/800s).
The images obviously had been unsharp from camera shake, but this was improbable if not impossible at 1/800s and 30mm using an VR/IS Lens.
Later someone told me he read somewhere in the internet that VR lenses tend to blur pictures at very short shutter speeds like mine.
I paid more attention to it, and my blur problems all are with VR lenses at very fast shutter speeds.
So I'd like to know: why to VR lenses blur pictures? At what speed do they ruin my pictures? Is there anything to do about this apart from disabling VR or better not buing lenses with VR/IS?
(interesting side note: as far as he told me only systems with VR/IS in the lens are prone to this problem. Systems with IS/VR in the DSLR Body do not have this problem).