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
Seems like this transaction malleability is a minor issue and of no threat to Bitcoin. I suspect this is the same issue facing the other exchanges. Of course, some people on this forum will try to spread FUD that Bitcoin is broken and you will never receive your BTC withdrawals etc.
I guess BTC withdrawals should be back to normal again within a few days at most after Bitstamp implements a solution.