Alchemists may have noticed that they are currently unable to select a specialization. This is because the specialization quest now requires materials from Mists of Pandaria. While this change was intended to eventually happen, our intentions were not to leave alchemists without the ability to select a specialization prior to the expansion’s release. You should be able to correctly select your specialization as of September 25.
We apologize for the inconvenience these may have caused. It’s only a matter of weeks now until Mists of Pandaria arrives, so we ask for your patience in the meantime. Thank you for your understanding. We can’t wait to finally clear the mist for all of you!