A small titter was raised on the Alliance side of the server by the following 'help' topic...
"I've completed the achievement for the black war bear, but I keep getting lots of them in my mailbox."
Blizzard's Helpful Response?
"This is a known issue, which we are working to correct. Feel free to delete the excess bears from your mailbox, there won't be any adverse effects."
Bears? Excess bears? FLEE!