it appears that nova having problem ...this is from them
 



The exchange has been attacked and caused some trades in certain markets - to be honest - has messed up balances in a few accounts.

Please withdraw your coins from the exchange - right away. And do not send any coins here! Any deposits will be rejected!

I am currently processing all ESP withdrawals by hand, they are having loads of tiny inputs and huge outputs, causing "Transaction to large" error. Putting all tiny inputs together, stay tuned, all your ESP will be sent out.

Dont forget to click the verification link inside your e-mail in order to activate the withdrawal.

More information can be found here