I have the same problem with gscan2pdf 0.9.26 run under Kubuntu 8.04.
The scan looks all right, but saves as a blank page whatever option I chose for compression.
The only way I seem to be able to save output is to save the session, then go into the gzip file and extract a .pnm file. That can then be saved as png.
Importing the png and then saving also produces a blank page.
I have the same problem with gscan2pdf 0.9.26 run under Kubuntu 8.04.
The scan looks all right, but saves as a blank page whatever option I chose for compression.
The only way I seem to be able to save output is to save the session, then go into the gzip file and extract a .pnm file. That can then be saved as png.
Importing the png and then saving also produces a blank page.
gscan2pdf --debug output attached.