[kde-linux] Keeping applications on the selected desktop

[occam]

I organise my work in desktops; one for file management, one for WWW, one for 
PIM etc. Each desktop has the appropriate applications open for instant 
access.

When I tried KDE4 I found that clicking on a URL in say KMail MOVED the 
browser to the current desktop.  Also when seeing on the panel that new email 
had arrived, clicking the mail icon moved KMail to the current desktop.

Believing that this was a KDE4 "feature", I went back to KDE 3.10.

However, when testing PCLinuxOS 2009 I found that KDE3.10 there also had that 
(to me) nasty application move feature. Of course I tried to find some 
appropriate setting in about:config, but no luck.

My hope is that someone can tell me how to defeat the application 
move "feature", or else give a lead to where such information can be found 
(or maybe what search terms to use?).