This is a pretest snapshot of what will be the Emacs 23.1 release. As a result, there may be packaging errors in the tarball, so please be on the lookout for problems with installation. Pretesters: please send an email to keramida@ceid.upatras.gr reporting success or failure on your systems. In addition, please report bugs via M-x report-emacs-bugs, or send an email to emacs-pretest-bug@gnu.org. For questions, please email emacs-devel@gnu.org. Emacs 23 contains many changes relative to Emacs 22. For details, see the file etc/NEWS. A few particular notes for those who have not been following Emacs CVS development: - The RMAIL mail package was recently changed to use mbox instead of Babyl for its internal format. This part of Emacs may be less stable than others; for safety, please back up your mail files before trying the new Rmail. - The default toolkit is now GTK+. You can use WITHOUT_GTK to build GNU Emacs with the Lucid toolkit.