Please first read Comments section here and in 6317399.

In com/sun/corba/se/impl/ior/WireObjectKeyTemplate.java (5.0u4):

// wrong line 134
      String str = new String( bid ) ;
// correction
	String str = null;
	try {
	    str = new String( bid ,"ISO-8859-1") ;
	} catch (java.io.UnsupportedEncodingException ex) {
	}