System-wide problem with backup files

[Nancy McDermott]

We use emacs 21.2.1 on Tru64 and Linux servers. Recently (and we don't know 
exactly when),
the backup files have not been updating properly. It only saves the 
original backup file, but no
other changes when the file is edited subsequently. We haven't upgraded 
emacs for over a year
so we haven't changed emacs itself recently. Does anyone have any idea what 
could be causing this?
Your help would be very much appreciated as the problem is affecting a lot 
of our users. Thanks.

Nancy McDermott, Director
Social Science Computing Cooperative
University of Wisconsin - Madison
1180 Observatory Drive
Madison, WI  53706
(608) 262-3206
mcdermot@ssc.wisc.edu