I want to bump the problem regarding custom font not working properly. I just downloaded the newest version of the patcher and tried to diffed a 2013-12-23 client. I applied the patch to support custom font (Arial), and it still uses the font that looks like Comic Sans MS in-game.
After trying to patch the said client on an older version of the patcher, the Arial font worked after selecting the option [use Arial on langtype], which is not present on the newest version of the patcher.