I encounter the same prob...JUST KIDDING! lol
My played extremely well. the panos loaded fast and i browse one right after the other. each time i clicked on a new pano, it would play on the same pop up window, replacing the previous pano.
one of my favorites is "the beach" one due to the sunsent rainbow like colors.
another is the "garden-night". what camera settings did ya use for this one mate?