It's a bit weird, but here we go:
Add the kweather applet to your toolbar. Then you'll have to configure the applet for the locations of choice. When that is done, you can add it to Kontact:
Settings | Configure Kontact
Then check the weather plugin. You'll have to restart Kontact as well.
ok, that's weird indeed. But i'll give it a shot tonight. Thanks for the tip.
Since this is the first release of kontakt i suspect/hope they will iron out some of these things in the next releases...
Sofar i'm really loving this new kontakt.