+*** You can change the speed of animated images.
+
+** Changes in encoding and decoding of text
+
+---
+*** New coding-system `prefer-utf-8'.
+This is like `undecided' but prefers UTF-8 on decoding if the text to
+be decoded does not contain any invalid UTF-8 sequences. On encoding,
+any non-ASCII characters are automatically encoded as UTF-8.
+
+---
+*** New attributes of coding-systems whose type is `undecided'.
+Two new attributes, `:inhibit-null-byte-detection' and
+`:inhibit-iso-escape-detection', determine how to detect encoding of
+text that includes null bytes and ISO-2022 escape sequences,
+respectively. Each of these attributes can be either nil, zero, or
+t. If it is t, decoding text ignores null bytes and, respectively,
+ISO-2022 sequences. If it is nil, null bytes cause text to be decoded
+with no-conversion and ISO-2022 sequences cause Emacs to assume the
+text is encoded in one of the ISO-2022 encodings, such as
+iso-2022-7bit. If the value is zero, Emacs consults the variables
+inhibit-null-byte-detection and inhibit-iso-escape-detection, which
+see.
+The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
+UTF-8 encoding and decoding, whenever possible.
+
+These attributes are only meaningful for coding-systems of type
+`undecided'. (The type of a coding-system is determined by its
+`:coding-type' attribute and can be accessed by calling the
+`coding-system-type' function.)
+
+** The function `set-visited-file-modtime' now accepts a 0 or -1 argument
+with the same interpretation as the returned value of `visited-file-modtime'.
+