Steps to reproduce: 1. visit URL in link above 2. change second field (to the left from the "Odeslat" button) value to 1 3. click "Odeslat" button 4. enjoy Safari not responding and eating all available CPU power IMNSHO Safari should handle misbehaving applets (e.g. tell user they're not responding and offer user terminate them).
Confirmed on Windows and also on Mac OS X. Java under Firefox also utilizes 100% CPU but the browser is fully responsible so I can close a page with the hanging applet. But I'm not sure if it's really Webkit issue.
Java Runtime is gone and also applet tag. Plus URL link is not working and Wayback Archive has this: https://web.archive.org/web/20070914022638/https://www.fce.vutbr.cz/PKO/0M2/PREDN2/klotoid/klo.htm Above seems to load same across Chrome Canary 123 & WebKit ToT. So marking this as 'RESOLVED CONFIGURATION CHANGED'.