As a warning to all Bitstamp users I repeat what many have already said: Use offline wallets and secure passwords.
My Bitstamp account apparently got hacked, all the money on the accout were spent on coins and the coins were then withdrawn to an address outside Bitstamp. I tried logging in one day and the site told me that my login ID ja password didn't match and as I retrieved my password via email, I found my account cleaned.
I have no idea how someone could have found out my ID/PW combination as I store them nowhere else but in my head and I haven't clicked any fishy banners while being logged into Bitstamp or anything like that. Also my password was rather strong. Could be a database break-in?
Anyway, as I and many else have said, keep your passwords secure and your coins offline. Cost me a bit over 3k $ not to follow those guide lines.
Ps. To the hacker if you're reading this, I hope you die a long painful death of cancer
What you are doing is f'king cheap and I feel nothing but deep pity towards you. Now go catch a cancer.