Was that taken as a screen capture...? You may find that as you rotate the image the viewing magnification changes, you should always edit a photograph using a viewing magnification that isn't an odd division - i.e. use 25% or 50% or 75%. Photoshop does some funny things to an image when you view it at 33.3% for example.
- as you know it will vary between cameras, I used 200% at 0.2pix 0 threshold then 90%, 0.3, 3. This was applied to the luminous channel. Not sure if you can do that within your editing package though.
If I could just get the afterburner working...