Slider Gallery doesn't behave the same on ui.jquery.com as it does on jqueryfordesigners.com

I don't know if this is intentional or not, but when viewing the Slider Gallery demo at http://ui.jquery.com/repository/real-world/product-slider/ doesn't behave the same as the demo at http://jqueryfordesigners.com/demo/slider-gallery.html. I don't know if there is a "right" way they should behave, but I'll explain the difference in the behavior.

On ui.jquery.com, if you click on the edge of "Wi-Fi" (if moving the mouse left-to-right the moment it changes from the move cursor to the hand/link select cursor) and drag to the right, the words are highlighted and the slider follows the pointer. On jqueryfordesigners.com however, the slider does not follow the cursor.

This "bug" was found using Firefox 2.0.0.15:

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/20080623 Firefox/2.0.0.15

See attached screenshots. Note: my screen capturing software did not accurately capture the cursor as it was still the hand/link selector cursor and not the arrow/default cursor.