** The default value of load-path now includes the directory
/usr/local/share/emacs/VERSION/site-lisp In addition to /usr/local/share/emacs/site-lisp. You can use this new directory for site-specific Lisp packages that belong with a particular Emacs version.

It is not unusual for a Lisp package that works well in one Emacs version to cause trouble in another. Sometimes packages need updating for incompatible changes; sometimes they look at internal data that has changed; sometimes the package has been installed in Emacs itself and the installed version should be used. Whatever the reason for the problem, this new feature makes it easier to solve.