Guild Wars 2

I was trying to get the Hint Completion achievement, and the last I’m missing is “Mailbox is full”.

Well, my mailbox is full, and there are even mails in queue waiting to be delivered (I know that for sure). Nonetheless, it doesn’t show as full. Tried switching toons, switching zones, logging in and out: nothing. No alert is displayed, and obviously the hint isn’t unlocked.

(and, apart from the bug, what kind of achievement is this? really…)

I have had this problem since before the recent event. I have found several of the hint achievements to be very buggy. I also bought something from the gem store and I have still to receive that achievement too….

A fix for this is to ensure that you have a full mailbox with mail from players—two friends had this problem last night, and once they deleted all NPC in-game mails and we gave him a full mailbox, they both got the achievement.

You are right, the NPC mails were somehow of interference. Deleted them all (some of them, btw, appear with the usual mail icon, so one should take care to go through all of them) and now I got it. Very bugged, anyway :-/