Charles Hines writes:
 I noticed that using the latest Ediff package (from the current SUMO,
in
 conjunction with 21.1.14) fails to work if clearcase mode has been
 loaded. 
<snip>
 and if I set the variable that keeps this handler from being
installed, ediff
 works fine.  But if this handler gets installed, ediff won't work on ANY 2
 files (not just files residing in the clearcase filesystem), failing with a
 "Can't diff remote files:" message. 
As an added datapoint, I was getting the same problem today with
hide-copyleft mode on.
   Sean