Hard to call it a leak when it's July 7 afternoon in Japan. *listens* :P
Edit:
LOL, like I said on the old forum, Yuriko Kaida is credited for chorus on all the WAKANA tracks. WAKANA is amusingly credited as WAKANA(FictionJunction).
"Pandora hearts" is indeed the first PV track. "Another dimension" is the often played dark "musix box" track that many thought featured YUUKA moaning, but noones credited in the booklet for it.
Actually, I think there are some errors in the booklet credits, cause there are no strings credits for this track or the next, yet there are for the previous "Tea saloon", when that one doesn't even have strings (or my hearing is bad).
"Ghost blood" is that BGM from when the girl died in ep5 or 6. "Bloody rabbit" is obviously the battle theme. ;) "Lost child" is one of my favorites
(episode 3).
"Alone" is the cute version of the battle theme from episode 3, while "Contractor" is a vocal version of the next episode preview melody, not sure if it's the same track as in ep3 ending battle, possibly.
I've not heard WAKANA's "Preparation" on the episodes I've seen. Very pretty.