The wild pets Darkmoon Glowfly and Crow have been fixed! Both are now capturable and come in all qualities. Got myself both in rare. :)
Another fix in the works, if it hasn't already been hotfixed yet, is the Darkmoon Hatchling. Many were scratching their heads as to why this particular DMF vendor pet is uncommon, while all the others are rare. Well, that's a mix up and the hatchling SHOULD be rare too.
There were many other little bug fixes here and there post-patch 5.1. I don't know if I can cover them all, let alone discover all of them lol.
We'll find out tomorrow if the Safari Hat is cooperating and will be sent to eligible toons. Crossing my fingers!
Unless developers change things last minute, you do not need to complete the achievement all on one toon to receive the hat. It's account-wide. And all toons on an account should receive one in the mail. If you've submitted a ticket and a GM tells you anything otherwise, please don't mind them.