1) I cannot complete the Social Hint Completion because the Mailbox Full Hint seems to be bugged. It never shows up for me even after I have had my friends mail me until my mailbox was full and even after I have deleted dozens of mails to make space. Because of this I cannot get the Achievement.
2) There seem to be 2 Whirling Axe Weapon Skills for the Asura Warrior but one is permanently locked. It stays greyed out. The one I can unlock as an Asura Warrior is less powerful than the one that stays greyed out.