Cufon gives double line height without control

Question

Cufonning a font onto a page with a Cycle jQuery plugin enabled, slowly scrolling through a set of messages. Each message moves off the viewport but then takes forever for the next one to appear. There is almost a one second gap between the first one leaving and the second one appearing.

Any reason why this is happening? Here's my code:

$(document).ready(function() {
    Cufon.replace('.titleswishh');

    $('.titleswishh').cycle({ 
     fx: 'scrollDown', 
     fit: 1,
     timeout: 3000,
     speed: 500
    });
});