Firefox/Thunderbird integration in FC3

[Orion Poplawski]

I'm testing out the standard firefox and thunderbird packages in Fedora 
Core 3.  Clicking on mailto: links in firefox and http: url's in 
thunderbird does nothing on my system.  Reading past post I was led to 
believe that this was configured automatically.  I'm running KDE.

Is there any other package that needs to be installed for this to work 
or other configuration to be done?

Thanks!

   Orion