no information on painter 12 features was published or leaked so far.
Rob from Corel is posting on this board and painterfactory.com sometimes, but afaik, last time he didn't say much prior to release except a vague release date info.
I wish they added both 64-bit and multithreading (I don't care much for linux support),
but I'm afraid it's a new set of bugs, single new type of brushes and brand new outdated interface... again.
on the fourth day of glitchmas my painter™ gave to me
four random crashes, three broken brushes, two system hangups & one corrupted workspace