JQuery UI Slider with Custom handle problem

JQuery UI Slider with Custom handle problem

I am currently working on updating this script over a jqueryfordesigners to JQuery 1.3.2 and UI 1.7.1 to use on a site I am working on.

http://jqueryfordesigners.com/slider-gallery/

I have it almost there. The trouble I am running in to is that the handle scrolls farther right than the slider bar is long. Also the handle jumps over so the image is positioned to the right of the cursor.

See my example: http://www.digitalbarnyard.com/slidertest

Any suggestions?