dired sort by date in ange-ftp dired buffers

[Stephen Eglen <S.J.Eglen@damtp.cam.ac.uk>]

A colleague just reported this problem with Emacs 24 (and says it wasn't
there in Emacs 23.x).  I confirmed it is a problem not just for the ftp
site he was accessing but also gnu.org.  e.g.

emacs -Q /ftp@ftp.gnu.org:/gnu

This brings up a dired buffer with the /gnu directory.  If I now hit 's'
to order by date, I then see an empty 'gnu' buffer, and the ftp buffer
*ftp ftp.gnu.org* is raised, showing:


ftp> cd /gnu/
250 Directory successfully changed.
ls -al -t /var/folders/ix/ixcktwmzGyyc6z4C5D4ypU+++TI/-Tmp-/ange-ftp39289ME2
ftp> usage: ls [remote-path [local-file]]
ftp> ls -al -t /var/folders/ix/ixcktwmzGyyc6z4C5D4ypU+++TI/-Tmp-/ange-ftp39289ME2
usage: ls [remote-path [local-file]]
ftp> 

Were the flags changed recently to do 'ls -al -t' rather than 'ls -alt'?
If I stay in the *ftp* buffer, 'ls -alt' works fine, but 'ls -al -t'
creates a file called '-t' in my local directory.

Stephen