in contrast to your post http://www.cryoutcreations.eu/wp_super_faq/what-browsers-does-mantra-work-on
I have problems with opera and safari browser.
While the slider on presentation page shows the uploaded pics in IE and FF, there is no display neither in opera (12.14) nor in safari (6.0.2). Only the loading circle is displayed.
It is definitely not a problem with other plugins because I deactivated all of them. That means, the other cause mentioned in the forum, a previously loaded java library isn´t the problem too.
I use the latest version of wordpress (3.5.1) as well as the latest version of mantra (188.8.131.52).
You can check the problem at http://www.puadb.de