If a host is configured with both an IPv6 and an IPv4 address, MariaDB will not start up. This was reported against mysql in http://bugs.mysql.com/bug.php?id=61713, and was later fixed. This fix is not in MariaDB.
I would also note that the mysql folks fixed it incorrectly. Please see http://bugs.mysql.com/bug.php?id=65122 for the follow up.
We are looking at migrating from MySQL to using MariaDB, but this inability to properly support IPv6 means that migration is a no-starter. I am astonished that since this was already at least partially fixed in MySQL it is not already in MariaDB.
zimbra@zre-ldap003:~$ cat /etc/hosts
10.137.242.53 zre-ldap003.eng.vmware.com zre-ldap003
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fc00:10:137:242::53 zre-ldap003.eng.vmware.com zre-ldap003
130402 16:51:24 mysqld_safe mysqld from pid file /opt/zimbra/db/mysql.pid ended
130402 16:56:53 mysqld_safe Starting mysqld daemon with databases from /opt/zimbra/db/data
130402 16:56:53 [ERROR] Can't start server: bind-address refers to multiple interfaces!
130402 16:56:53 [ERROR] Aborting