When an 8.5 x 14 in document is put into my scanner, xsane scans only the top 8.4 x 14 in portion of it.  How can I change this behavior?  (It's not easy.) 

Simple scan scans the entire document, so the problem is not with the scanner nor with the sane backend.

Scanner: FUJITSU ScanSnap S1300
Xsane version: 0.998
Sane version: 1.0.23
simple-scan version: 3.6.0
KDE: 4.10.1
Fedora-18 with all updates.

Thanks - jon