I suspected that was the answer but this blog post http://blog.linkedin.com/2012/06/06/linkedin-member-passwords-compromised/ http://blog.linkedin.com/2012/06/0

I suspected that was the answer but this blog post http://blog.linkedin.com/2012/06/06/linkedin-member-passwords-compromised/ http://blog.linkedin.com/2012/06/06/linkedin-member-password... mentions that they are salting the passwords.