I am in the process of updating a website, which uses Highslide and a thumbnail strip on the bottom. The old website works ilke a charm but the new one fails. On my test website (newer layout) the thumbnail strip shows the last picture five times.

Page on original website

Page with the issue

The problem is on every detail page, so not just visible on this one page. The referenced libraries are identical on both servers. Hope somebody can point me in the right direction.