My apologies
I did not realize that when I left clicked on an icon( pdf) in the documents folder that it was NOT using kpdf but Konqueror to open it. Somehow I had always assumed that kpdf was the only konqueror app that could open a pdf (other than Adobe).
(I feel that previously my computer DID open these pdf's with Kpdf, using left click, and that I did something recently to change this. Is this possible ?)
Perhaps I could ask where on my computer (Kubuntu 6.06) I can find out which version of KDE i am using. Going to Kinfo center does not list this.
Many thanks for your help