I have loaded this page several times with Safari latest release, no problem Can not get a complete load with build WebKit-SVN-r39370. Wheel keeps spinning, blue progress bar stalls at 80..90%.
No reproducible test case and the webpage has been updated multiple times and browsers are evolved so much. So we will not be able to fix it at this time anymore on whatever the issue was faced by the user. I am going to mark this as "RESOLVED WONTFIX". Thanks!