LP:936277 - Ubuntu 12.04 my.cnf contains unknown directive: lc-messages-dir

I'm on a fresh install of a daily build of Ubuntu 12.04. I initially tried to install mariadb from the Ubuntu 11.10 packages, but this failed due to unresolvable conflicts. The second option was to try to install Mariadb from generic linux packages. This went more or less smoothly, except that when I ran mysql_install_db it was unable to find the mysqld binary, the basedir option seems mandatory/musthave?

After fixing that however, I got the following output:
root@dolf-ThinkPad-T520:/usr/local/mysql# ./scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql
Installing MariaDB/MySQL system tables in '/var/lib/mysql' ...
120219 15:58:30 [Warning] option 'thread_stack': unsigned value 196608 adjusted to 245760
120219 15:58:30 [ERROR] /usr/local/mysql/bin/mysqld: unknown variable 'lc-messages-dir=/usr/share/mysql'
120219 15:58:30 [ERROR] Aborting
...

Problem: Unknown variable lc-messages-dir
Removing /etc/mysql resolved the issue.
Version used: mariadb-5.3.4-rc-Linux-x86_64/

Even though Ubuntu 12.04 is still alpha, it would of course be great if these issues could be fixed before it's released as GA.
If questions, I am also available on the IRCs.

TL