Did you make sure to cut a calibration notch/square in the same place in
your holder? If not, the scanner will miscalibrate and produce problems
similar to what you describe. Of course, even if you do get the calibration
right, it can still produce the problem but at least you have helped
eliminate one of the possible causes I know the Canon 9900 series and
all the Epsons require this, so I imagine your scanner does too.

Doug
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Doug's "MF Film Holder" for batch scanning "strips" of 120/220 medium format
film:
http://home.earthlink.net/~dougfishe...mainintro.html