Comment 12 for bug 173136

Okay I think I have a workaround. This has to do with how the image is being rendered--although I'll need to test it more.

I opened the 'scanned file jpg' with a gnome application called image viewer--It's the default application for viewing images in gnome. I then 'printed' the file to the printer fax queue. Opened hp-toolbox (or hp-sendfax) the file will pop into the fax you can then select the person to fax to and fax and it should work.

Steps:
Open file using a different application
Click that applications Print feature.
Print the file to the printer fax queue. IE select OfficeJet_7200_fax
Open hp-toolbox, click fax. (or run hp-sendfax)
The file should pop into the add file to fax queue.
Select recipient.
Click fax.

Fax should be sent correctly.

This work for you David?
A