Due to Christmas, this release note comes late.
For MySQL users release 5.0.0 is a milestone: you can now write stored
procedures in MySQL.
InnoDB in this MySQL release is essentially the same as in 4.1.1, with the
bug fixes of 4.0.17 included. Later 5.0.x versions will probably include new
space saving table formats for InnoDB.
IMPORTANT NOTE: if you upgrade to InnoDB-4.1.1 or higher (like to 5.0.0),
you cannot downgrade to a version lower than 4.1.1 any more! That is because
earlier versions of InnoDB are not aware of multiple tablespaces.
Foreign keys, transactions, and row level locking for MySQL
InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up MyISAM