Smart Sharpen doesn't apply (or apply completely). Photoshop CC on Mac OSX 10.7.5
new merged layer > Filter > Sharpen > Smart Sharpen > adjust sliders > toggle Preview > click OK (progress bar) > nothing or 50% applied
1. Smart Sharpen (SS) shows changes from sliders in SS dialog box AND on underlaying image in PS but checking and unchecking the Preview box only toggles the image in PS, the SS dialog box does not change.
2. After clicking 'OK' SS does not seem to apply at normal ranges but when the radius is cranked up to super ugly it appears to apply at about 50% (Opacity and Fill are at 100%).
Related Problem:
After using 'Camera Raw as a filter' on a new merged layer, then adding a layer mask, and then painting with a brush at 100% opacity and Flow, it appears that only about 50% opacity is applied to the mask from the brush.