The patch suggested in the sane-devel mailing list  by Nicolas
Martin fixes the scanning problem on my Pixma MP600.
I would be very glad if you, and any other readers of these bugreports
that are affected by the problem could try whether that patch fixes their
problems and report it to email@example.com (and/or to me).
I've compiled the pixma libs for the amd64 platform (i.e. 64 bit amd and
intel processors) and put them up for a try here .
You'll need to download them and install them (as root) with:
Then you can start xsane and try whether it now works with the fixed
If it doesn't, or you just want to go back to your previous
configuration, then you can just (re-)install the libsane deb package 
and it will clean up all changes made by the few lines above. Again as