( what browser should open as you click on a link in an email )
I had this problem, I really do like Evolution for my mail and it used to open the links send to me in an email in Galeon, a nice fast browser.
Suddenly with the new Mandrake 9.1 it opened the links in Mozilla, that´s a much slower browser.
So I found the tweak :
A window will pop up, go to the "Preferred Applications" and there set the default browser to the one you prefer.
Start or restart Evolution and notice the difference