Seriously. I thought this bit of code from the MtGox leak was interesting. Sure looks like a potential double-spend race condition: $out = \DB::DAO('Money_

Seriously. I thought this bit of code from the MtGox leak was interesting. Sure looks like a potential double-spend race condition: $out = \DB::DAO('Money_Bitcoin_Block_Tx_Out')->searchOne(array('Hash' => $bean->Hash, 'N' => $bean->N)); if ($out) { if ($out->Claimed == 'Y') { $bean->Available = 'N'; $bean->commit(); continue; } } What if someone else claims $out between the read and commit? Is no one at BTC exchanges really asking these kinds of questions?