JDK 6.0 b59g distributive for amd 64 contains applet demos, but no plugin. Thus system tries to download JDK 1.5 then executing applet demos. I believe these demos should be excluded for amd 64.
after installation of JDK/JRE on amd 64 Windows XP 64 folder jre/lib/applet is empty
after installation of JDK/JRE on amd 64 Windows XP 64 folder jre/lib/applet is empty