Hmm are you talking about ‘G Chroma Sharpen (Interlaced/ Progressive)’? Because that doesnt seem to do the trick, no matter how I do it…. Also how do you make sure ‘high precision rendering’ is on?
An example of what it looks like is here: 
(Ignore the fact it’s overexposed its meant to look/ be coloured like that) but the blocks on her forehead should NOT be there!
The AJA option isnt working either, although software options would be preferable at this point to save time 🙂
😀
Tom Morter-Laing
Certified Apple Product Proffessional, 2010
Production Assistant, Grace Productions
Degree; TV Production