1. Option to set date format. Three new fields in Settings => Time zone settings section. This is available per install and not per individual user.
2. PHP-GeoIP extension support.
3. {nick} support in canned messages.

edit your settings/settings.ini.php file and under 'force_virtual_host' => false,
add
'date_format' => 'Y-m-d',
'date_hour_format' => 'H:i:s',
'date_date_hour_format' => 'Y-m-d H:i:s',

No database update this time. So just follow standard upgrade tutorial.