I'll chime in to and confirm Shadow/Highlight causes a visible and unacceptable flickering on at least half of the shots I apply it to. That is common across AE CS5/6 and PR CS5/6, in both Auto+Temporal Smoothing and full manual modes. I've found flickering across a range of sources (Red, AVCHD, HDSLR, Uncompressed digibeta, MiniDV) at range of resolutions. All clips that flicker were shot on full manual with no adjustment in exposure settings. I can't work out what causes the flickering - I haven't been able to find any pattern amongst the clips that do. It's a real shame because when it works the filter does some truly wonderful things to perceived dynamic range.
Also, the bug/feature request form links to an error page whenever I submit an entry.
