>Did the new version of PDF::Builder solve the problem? Yes, it did, without any further change. I have created the pdf and the log files at http://fly.isti.cnr.it/tmp/gscan2pdf with exactly the same procedure as before.
>Did selecting compression=Auto or compression=Flate solve the problem? I had not time to try it at the moment, and now my library is updated and everything works alright. However, I enabled compression=Auto and created a further log and pdf, which you find in the same place. By the way, I have no "Flate" compression to choose. I have Auto, LZW, Zip, Packbits, G3, G4, PNG, JPEG, None. Thanks for your work -- Francesco Potortì (ricercatore) Voice: +39.050.621.3058 ISTI - Area della ricerca CNR Mobile: +39.348.8283.107 via G. Moruzzi 1, I-56124 Pisa Skype: wnlabisti (gate 20, 1st floor, room C71) Web: http://fly.isti.cnr.it