I have one question about the Sharpen Previews feature. When I have it set on, it sharpens the previews nicely, allowing one to better judge if the photo is sharp without zooming to 100%. However, when then I _do_ zoom to 100%, with the feature ON, the photo viewed at 100% is _still_ sharpened. I am not sure if this is a design feature or not, but I think most people when viewing at 100% want to see the exact original pixels, no sharpening added. I am attaching a sample, with High-Iso photos the effect is even more apparent:
Sorry I just noticed it now, not before in the beta
Besides, I am not really sure if it isn't a feature as intended...