Hello,
First of all, I have no experience whatsoever with Linux, so I apologise in advance for any stupidity I might have made, or detail I might have omitted. That being said, I can proceed:

I have just installed Fedora Core 5 (2.6.15-1.2054_FC5smp), and I'm trying to use the CanoScan LiDE20 scanner which, according to sane-project.org/sane-mfgs.html, is completely supported by SANE. sane-find-scanner detects it, but it jams (with the lamps on) whenever I try to scanimage, and nothing short of unplugging it from the PC will stop it. I reboot to Windows XP (ahh, the magic of dual-boot), and it scans perfectly well, not jamming at all (which proves that the scanner is working fine).
I then reboot to Linux, sane-find-scanner finds it again, and scanimage makes it jam again. Terminating scanimage gives only a "Trying to stop scanner" message, but the scanner does not stop until I unplug it. Trying to run scanimage again (with the scanner plugged back in, of course) results in "scanimage: no SANE devices found", even though sane-find-scanner still sees it.

What can I do about this problem?

Thank you for your time,

-Fibonacci

P.D.: Sorry for posting this here, but I found no forums at the sane-project webpage, and the IRC channel is always silent.