> And after adding filters I can download it, but links to
> graphics like:
> <http://images5.example.com/?iid=yfa0c9&outx=600&noresize=1&nostamp=1>
> display as jumbled text rather than as a graphic

Go in 'Set Options' / 'Scan rules' / 'Check document type' and choose 'If
Unknown' ('If Unknown (except /)' is the default)