Downloads at https://jdk6.dev.java.net/ vs. http://java.sun.com/javase/ ?? | Java.net

Can someone please shed some light on exactly what is posted at https://jdk6.dev.java.net/? According to http://java.sun.com/javase/downloads/index.jsp, the latest JDK is JDK 6 Update 4. According to the release notes, "The full internal version number fo

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