The little icon next to your character, that tells you, that you have mail, that was something that went live with the start of the expansion a year ago, and they had to take it out several times. Last patch they already tried to fix it. This patch, they tried again, and it still doesn't work. Now it tells you, that you have mail, when you don't have any mail anymore. Even the symbol on your minimap tells you, that you have mail, when you've completely emptied your mailbox. After a year of trying and failing, I thought they might finally get this little feature fixed.