Understand Cufon Fonts
Cufon fonts can be used together with an experiment set up in Convert Experiences but some extra code needs to be added inside the variation Code.
Basically, after the variation is all setup, you need to go into the "Variation Code" and add one last line that reads like below:
if (typeof(Cufon) != "undefined") Cufon.refresh();
This code will re-apply the the Cufon fonts after the variation code was executed making sure the Test displays properly in user's browser.