Scanned image doesn't match prescan marquee

[stamper]

When I use SF App in OS X and prescan the image by drawing the marquee, I get a different result in the final scan.
ie: if I scan a business card by drawing the marquee box around the card after a prescan, the final scanned image does NOT match the marquee, the scan is shifted, cutting off part of the image and picking up some of the background that was not in my marquee. However, when I use the SF App in OS 9 it works FINE, the scan is EXACTLY what I drew the marquee around! Any suggestions?

[LSI_Support]

Please contact support@silverfast.de

[LeRoy]

I have the same problem as Stamper, with a Umax PowerLook 2100XL scanner with SF 6.0.2r.39 running on Mac OS 10.2.6. The image jumps about 3/4 inch in the direction of scan. The only workaround I have is to marquee a larger area than the final scan and crop later. Has a fix for this bug been found?

[LeRoy]

I finally fixed this bug on the Umax 2100, with no help from tech support. They never answered my direct queries. But anyway, this is a SCSI scanner, and SF does not work directly with it. I use a Microtech FireWire-to-SCSI adapter, with internal termination in the scanner turned on. Turns out this is not enough termination. I plugged an APS external terminator into the chain. The scans don't shift anymore! Try using a terminator.