#4 - Dec. 20, 2012, 4:56 p.m.
Over the weekend of December 15th, a problem developed where a small number of players who unlocked Black Lion Chests received two rather than the intended three items per chest. The issue was corrected with a build on Monday and all chests are functioning properly now.
To ensure that players get all their chest rewards, we checked to see who opened Black Lion Chests and was affected by this issue during the period in question. If your account was affected by this issue, you were on this list. Therefore, we sent you one or more Black Lion Chests via in-game mail.
Hope that clears it up.