System properties

[Michael Hall]

Are differences between current and Apple builds going to be addressed at some point?
Are new values assumed to be what is currently considered correct?
Should differences be bug reported?
Are these considered differences that are up to whoever is managing the builds? 
(My java shell app listing system properties - I'm on a slightly older unofficial build yet)

e.g.
Java 6
set | grep encoding
System.in:39:sun.jnu.encoding=MacRoman
System.in:40:file.encoding.pkg=sun.io
System.in:62:sun.io.unicode.encoding=UnicodeLittle
System.in:116:file.encoding=MacRoman

Java 7
set | grep encoding
System.in:37:sun.jnu.encoding=US-ASCII
System.in:38:file.encoding.pkg=sun.io
System.in:62:sun.io.unicode.encoding=UnicodeBig
System.in:111:file.encoding=US-ASCII