Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
For older news, see the file ONEWS
+\f
+* Changes in Emacs 21.4
+
+** UTF-16 coding systems changed their behaviour. Coding systems
+`mule-utf-16-le' and `mule-utf-16-be' now don't skip the first two
+bytes as BOM on decoding, and don't produce BOM bytes on encoding.
+The new coding systems `mule-utf-16-le-with-signature' and
+`mule-utf-16-be-with-signature' behave the same way as the previous
+`mule-utf-16-le' and `mule-utf-16-be' respectively. So,
+`utf-16-le-with-signature-dos' is useful as the value of
+`selection-coding-system' in MS Windows.a
+
\f
* Installation changes in Emacs 21.3