[sane-devel] ADF - Calibration problem

[arobase er]

Hello,

I have started using sane to scan using an ADF.

$ scanimage -V
scanimage (sane-backends) 1.0.22; backend version 1.0.22

$ scanimage -L
device `hp5590:libusb:036:003' is a HP 4500C/5550C Workgroup scanner

$ scanimage --batch --format=tiff --mode Gray --resolution 75 --source ADF
--batch-increment 2

Here's the output for the first 3 pages: *http://tinyurl.com/b3shh4v*

The problem is that a portion of the left hand side shows on the rhs and
conversely. This portion grows with the number of scanned pages.

Any advice on fixing this calibration problem?

Platform: OS X 10.6+ - MacPorts 2.1.3
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