1. Install the Java plugin (I used the sun-java6-plugin Debian package) 2. In Midori or Liferea, disable Netscape/Browser plugins in the preferences 3. Restart Midori/Liferea (just in case) 4. Go to http://www.freechess.org/Login/jin/applet.php 5. Click on "Login as Guest" -> Java window pops up
Tested with the 1.2.1-2 Debian package on amd64.
Still broken with 1.2.4, seems to be fixed with latest trunk.
Not fixed for me, "icedtea-web-1.4.1/plugin/icedteanp/IcedTeaNPPlugin.cc" loads java with "enable-plugins" set to FALSE. grep "Version" /usr/lib64/pkgconfig/webkitgtk-3.0.pc Version: 2.1.92