\f
* Incompatible Lisp Changes in Emacs 23.1
+** The argument DEFAULT of minibuffer input functions `read-from-minibuffer',
+`read-string', `completing-read', `read-buffer', `read-command',
+`read-variable' now can be a list of default values. The elements of
+this list are available for inserting to the minibuffer with `M-n'.
+If the user enters empty input, the first element is used as the default.
+
** `functionp' returns nil for special forms.
I.e., it only returns t for objects that can be passed to `funcall'.