Pare che un bug abbia impedito di criptare le password degli utenti di Twitter. La società dice che non ci sono prove di falle di sicurezza o di altri problemi seri, ma meglio cambiare la password.

When you set a password for your Twitter account, we use technology that masks it so no one at the company can see it. We recently identified a bug that stored passwords unmasked in an internal log. We have fixed the bug, and our investigation shows no indication of breach or misuse by anyone.
Out of an abundance of caution, we ask that you consider changing your password on all services where you’ve used this password.