https://www.bitstamp.net/article/bitcoin-withdraws-suspended/Dear Bitstamp users
Bitstamps exchange software is extremely cautious concerning Bitcoin transactions. Currently it has suspended processing Bitcoin withdrawals due to inconsistent results reported by our bitcoind wallet, caused by a denial-of-service attack using transaction malleability to temporarily disrupt balance checking. As such, Bitcoin withdrawal processing will be suspended temporarily until a software fix is issued.
No funds have been lost and no funds are at risk.
This is a denial-of-service attack made possible by some misunderstandings in Bitcoin wallet implementations. These misunderstandings have simple solutions that are being implemented as we speak, and we're confident everything will be back to normal shortly.
Withdrawals which failed on the 10th and 11th of February will be canceled and the amounts added back to the customer account balances.
We will communicate any further developments regarding this issue.
Thank you for your understanding!
Best regards
Bitstamp team
so this transaciton malleability can easily be fixed then?
My understanding is that, that would be the long term solution but short term it enough to make the exchange wallets so that this malleability doesn't matter or do any harm.
doesn't it harm normal transactions though?? from wallet to wallet
Normal user-to-user transactions are working fine. The problems come from automated systems that need some way to keep track of how much funds are available and whether transactions that have been sent were received properly. These automated systems often use the tx-id to keep track of transactions, but as we've seen, the tx-id is not a reliable identifier.