Thanks for your prompt reply ...
>>> From where can we obtain this previous version?
rw> `apt-get install packagename=version` IIRC.
# apt-get install mozilla-firefox=1.0.4-2sarge1
Reading Package Lists... Done
Building Dependency Tree... Done
E: Version '1.0.4-2sarge1' for 'mozilla-firefox' was not found
Didn't work! Other ideas?
-Kenneth