There is a curious new review at ePhotozine! They tested both kit lenses, the first generation 14-42mm for Micro Four Thirds (Click here to read the review) and the second generation 14-42mm lens for Micro Four Thirds (Click here to read the review). And guess what? There is indeed a small image quality difference! ePhotozine writes: “The MkI version of this lens may provide better sharpness from edge to edge, but the enhanced design and faster focusing make the lower sharpness towards the edges penalty worth paying.”
Those are the search links to all version of the 14-42mm lens (as you know there are now three different versions!): [shopcountry 14816].