Thunderbird: Web links and default mailer in KDE

Hi

I really like Thunderbird, which I run on a KDE 3.1.4 desktop. However, 
I have a couple of small issues and hope someone on the list can point 
me in the right direction.

When I click on Web links in a message nothing happens. I have to cut 
and paste the link into my browser rather than 1 click to open a browser 
window that points at the desired location.

Secondly, I've set up Thunderbird as my KDE email client but this fails 
to work at it should.

Any hints, tips or pointers would be greatly appreciated.

Many Thanks

Neil Williams