+* Installation changes
+
+** Upgrading from previous (stable) version if you have used No Gnus.
+
+If you have tried No Gnus (the unstable Gnus branch leading to this
+release) but went back to a stable version, be careful when upgrading to
+this version. In particular, you will probably want to remove the
+`~/News/marks' directory (perhaps selectively), so that flags are read
+from your `~/.newsrc.eld' instead of from the stale marks file, where
+this release will store flags for nntp. See a later entry for more
+information about nntp marks. Note that downgrading isn't safe in
+general.
+
+** Incompatibility when switching from Emacs 23 to Emacs 22 In Emacs 23,
+Gnus uses Emacs' new internal coding system `utf-8-emacs' for saving
+articles drafts and `~/.newsrc.eld'. These files may not be read
+correctly in Emacs 22 and below. If you want to use Gnus across
+different Emacs versions, you may set `mm-auto-save-coding-system' to
+`emacs-mule'.
+
+** Lisp files are now installed in `.../site-lisp/gnus/' by default. It
+defaulted to `.../site-lisp/' formerly. In addition to this, the new
+installer issues a warning if other Gnus installations which will shadow
+the latest one are detected. You can then remove those shadows manually
+or remove them using `make remove-installed-shadows'.
+
+** The installation directory name is allowed to have spaces and/or tabs.