It has definitely been an interesting 24-hours on the Public Test Realms, especially for us Warlocks. And it has all culminated into a very interesting outcome, at least at the present. If you plan on copying a pre-made 'lock to the PTR this evening, or even cloning one of your own to test your own gear, you better bring a hefty amount of gold with you. Otherwise, you'll be stuck with some very empty action bars, and an extremely dry spell book to match.
In "fixing" the Seed of Corruption issue that players discovered almost immediately after the PTRs came back online today, Blizzard decided it was best to blank all Warlock talents and abilities and require the class as a whole to re-train every single spell from scratch. The total cost? 350g. And that doesn't even take into account our pets, which were also wiped from our spell books and must be reacquired via their original quest lines - an unfortunate and unfair result to a problem Blizzard created.
So, unless you're a Warlock of incredible wealth, endless patience, and that only cares for Fel Guards, stay away from the PTRs. At the moment, for us, they are a complete waste of time.