Court document referenced online.
Apparently it is legal for Bush to authorize dissemination of classified material (though to do so for political gain is petty at best) but of course this means Bush lied to us when he said he wanted to get to the bottom of who was behind the leak. But we should be used to being lied to by now.
The New York Sun broke this story today but their servers appear to be overwhelmed right now.
ETA: And if this is all true, and Bush knew from the beginning that he had effectively declassified this information, why allow taxpayers to waste money on an investigation of the matter? Yes I understand it is awkward, but it is just another waste of tax dollars. Look at your paystubs and tell me if you're happy to have that money spent this way. If not, complain to your representatives!