Nikon D90 Breakthrough! Part II - The solution by others

Searching the internet for solutions to the D90 stair stepping problem, we found an After Effects project called 'D_MOVIE_FIXER' [technique created by Lee Wilson (dvxuser) project finished by Matthew Bennett].
What they had done was split the original picture using masks to horizontal lines of 8 or 9 pixels high, moving them leaving 1-pixel empty lines and then filling them by interpolation.
At first it seemed to work OK although we found that some lines on the lower part of the picture still did have problems (this was due to incorrect slicing).
We also found a nuke tool doing more or less the same job with the same technique. This one looked better but still had some problematic lines (also due to incorrect slicing). One of the problems of using this method was that we don't use Nuke and didn't plan on getting it only to fix this problem.
Another problem is batch processing. The After Effects method which is our program of choice worked using a complex series of nested comps and mask slices which was awkward and time consuming and required footage replacement for each movie file we would want to process.
Not an elegant solution
NEXT: Definitive solution using Fusion. Fast and elegant