I understand your suggestion but because I logged into the Forums from a secondary computer never before used and cleared the cache and cookie history and all forms of stored data while testing other computers as well, leads me to believe it is not (quite) that simple but all in all I agree. It is something minor with the rendering between the script, database and browser somewhere. Besides I was not aware Firefox and IE currently handled cookies different enough that one would over-ride and log in and the other would not... Interesting.
None-the-less, much testing and since the change I have had no problem. Will re-add the www later and see if the problem returns just to finalize the examination.
Hope this helps someone else who might have similar problems.
FYI - we run our forum script via https:// and other options that keep us on our toes checking for script anomalies anyway.
Gizmo - I forgot to mention I did not add the www before the problem started it was already there from the start of our use of version 7 - later...
