@nicolas gapaillard: do you have Xinerama enabled?
Since it's still happening with the latest proprietary NVidia driver, and according to nicolas, also with ATi drivers, it seems likely that this really is a bug in xsane itself (like the error message already states). Especially since no other software, including scanner utilities, crashes with that error on my system.
Still happening in Lucid with xsane-0.996.
@nicolas gapaillard: do you have Xinerama enabled?
Since it's still happening with the latest proprietary NVidia driver, and according to nicolas, also with ATi drivers, it seems likely that this really is a bug in xsane itself (like the error message already states). Especially since no other software, including scanner utilities, crashes with that error on my system.