Changes:

skip_imap_in_backups to not include email data [feature]
secure_access_group prevents read of domains/default directory [bugfix]
ips are not sorted correctly with ipv6 enabled [bugfix]
Prevent CNAME duplicate of A record [bugfix]
user_backup_pre.sh was not aborting backup on non-zero [bugfix]
better support for IPv6 in dns_a.conf and dns_aaaa.conf [bugfix]
Security issue with control of MySQL [bugfix]
check_subdomain_owner=1 gets stuck in loop [bugfix]
Security check on Referer header [bugfix]
check_subdomain_owner to allow owner to create users with subdomains [bugfix]

http://www.directadmin.com/versions.php?version=1.345000