@Tom,
First, thanks for the quick reply and your interest.
* The UnFilter.dll version is 0.0.1.1, dated 29.06.2002.
* The (slight) darkening effect of UnFilter is certain imho (and I can also post screenshots for comparison from many different test rips to prove it), but as you said it would be much better to leave this effect "as is" imho
, since it is really very helpful against one of the ugliest problems of the encoding scene -> black-blocking!
* I have attached a sample image with light lines at edges (UnFilter(-10,-10) / XviD / BicubicResize(640,352,0,0.5) / MPEG2DEC2.dll / avisynth 2.06)
regards,
iago