Head out to http://www.brucegust.com/campaign/index.php
When you mouse over the nav bar, you'll see how I've got a little image swap going on, but the image takes a second to load. So, instead of the user being treated to an experience where the link immediately changes over their mouseover, it takes a second for the mouseover image to appear.
What can I do differently or what I doing wrong that I can improve on so I get an immediate change rather than one that appears sluggish?
My stylesheet is at http://www.brucegust.com/campaign/stylesheet.css