Well the script is as simple as
avisource("MyVideo.avi")
ApplyRange(35,829,"Greyscale")
I'm comparing on AvsP with two scripts on two tabs, the first with grayscale but no applyrange, the second with applyrange so i'm 100% positive on what i've stated earlier
Edit:
2 pics to illustrate:
frame 414 (applyrange working ok)
http://imageupload.org/?d=B4CE4D9A1
frame 415: (not working (chroma is not removed, you can clearly see some green which is exactly what i want to remove)
http://imageupload.org/?d=DF11CD361
If i do a greyscale() on frame 415 w/o applyrange it works ok so...
Frame 415 should look like this:
http://imageupload.org/?d=0FAE17631