problems with kmail and url's

[Marianne Taylor]

I have a LFS system with kde 3.1 installed.  I use Mozilla 1.3b as my default 
web browser.  When I get a url in kmail and click on it, it opens fine in 
mozilla, but it has used an address in the temp directory rather than the 
real url.  Some program must be downloading the web page in  anticipation of 
me clicking on it.  

Does anyone know how to turn this most irritating behaviour off?