openssh-2.9p1 scp to ssh-2.4 fails

[J.S.Peatfield at damtp.cam.ac.uk]

Am I missing something obvious or does the scp in openssh not interoperate with
the scp in ssh-2.4?  I don't have any ssh-2.4 systems but a user here trying
to fetch a file from a site which uses it (and doesn't have scp1 gets):

scp -o 'protocol 2' -o  'loglevel debug3' -v herrada at eurus2.us.es:tf19.dat