Hi Klaus
I see on the updated krpano 1.0.8.15 (2012-10-05) you mentioned "Fix: Chrome Linux - visible cube-edges."... but still I get the same problem, have a look on attached screenshot.
The application uses krpano html5 viewer on desktop with following specs: Ubuntu 12.04 with NVIDIA graphics, Chrome 22.0.1229.79.
Please let me know if maybe it's something I need to set/edit, i've tried on different linux machines still same issue.