** The new command M-x customize-changed-options lets you customize<BR>
all the options whose meanings or default values have changed in
recent Emacs versions.  You specify a previous Emacs version number as
argument, and the command creates a customization buffer showing all
the customizable options which were changed since that version.
Newly added options are included as well.
<P>
If you don't specify a particular version number argument,
then the customization buffer shows all the customizable options
for which Emacs versions of changes are recorded.
<P>
This function is also bound to the Changed Options entry in the
Customize menu.
<P>