A few players opened up their expansion packs to find that their code for the Netherwhelp pet didn't work, and they weren't able to get their pet ingame. But Blizzard wasted no time in fixing things: they put up new instructions to get the pet, and they compensated players with not only the Netherwhelp pet, but another pet named Lurky the Murloc (brother, we assume, to Murky, the Murloc pet available at Blizzcon, and Gurky, the pet Blizzard has been giving away in a few places). In addition, they gave 2 free days of play to people affected.
On one hand, I'm impressed that Blizzard fixed things so quickly, and was so generous in doing so. But on the other hand, I'm wondering: maybe my expansion could be broken somehow? Please?