Character.isLetterOrDigit(char) returns different value in java 6 and 7

Question

The following code snippet returns 46059 on Java 6 and 48757 on Java 7. Any ideas what might have changed?

int i = 0;
for(char c = Character.MIN_VALUE; c < Character.MAX_VALUE; c++){
    if(Character.isLetterOrDigit(c)){
        i++;
    }
}
System.out.println(i);

Answer 1

I suspect this document holds the answer:

New Scripts and Characters from Unicode 6.0.0
Early versions of the Java SE 7 release added support for Unicode 5.1.0. The final version of the Java SE 7 release supports Unicode 6.0.0. Unicode 6.0.0 is a major version of the Unicode Standard and adds support for over 2000 additional characters, as well as support for properties and data files.