Problem with editing files (emacs for SUSE Linux)

[Michael Wolf <michael.wolf@econ.upf.es>]

Hi there,

I am not sure whether this is the right outlet for my question. But I am 
quite desperate, so please forgive me if it's not.

I have used emas before on different platforms and I have never had the
problem that I am having right now. Also, I have not changed the work 
with emacs in any way.

What happens is the following: when I edit a file (whether it is a text 
file, a Latex file, a C++ file, etc.) all of sudden unwanted changes 
appear in my file. Basically, a part of text that I had deleted 
somewhere else earlier on (and at times even text that I had deleted 
outside of emacs) will appear out of nowhere all over my file. Say, it 
might appear in 5 to 10 different locations! I have no idea what 
trigggers this and, of course, it is very annoying. Since I have never 
had this problem before, I am tempted to conclude it could be due to a 
bug in my particular version of emacs:

GNU Emacs 20.7.1 (i386-suse-linux)

If you have any pointers, please reply to me directly, since I am not 
subscribed to the group. My e-mail address is: michael.wolf@econ.upf.es

Thanks much,
Michael