In the Linux versions of both Firefox 18 and Chromium 24, I only get "Loading, please wait" spinner when I go to "Edit design" or "Repository". The knxweb2 version http://sourceforge.net/projects/linknx/files/knxweb/knxweb-0.9/knxweb-0.9.2.tar.gz/download had worked before and I also tried the cvs version with the default design only.
edit design and repository work after toggeling Admin>Config KnxWeb>useJavaIfAvailable