merlin b72, s9 b42 nightly, gb18030 locale

enter the demo/jfc/Notepad, run:

# java -jar Notepad.jar

then open the attachment gb18030.all will fail:

java.lang.InternalError: Converter malfunction (GB18030) -- please submit a bug
report via http://java.sun.com/cgi-bin/bugreport.cgi
        at java.io.InputStreamReader$ConverterFiller.malfunction(InputStreamRead
er.java:198)
        at java.io.InputStreamReader$ConverterFiller.convertInto(InputStreamRead
er.java:214)
        at java.io.InputStreamReader$ConverterFiller.fill(InputStreamReader.java
:241)
        at java.io.InputStreamReader.read(InputStreamReader.java:511)
        at Notepad$FileLoader.run(Notepad.java:712)


in merlin b73 also occure.