Then change your passwords NOW
http://www.businessinsider.com/linkedin-hacked-2012-6
6.5 million encrypted LinkedIn passwords have leaked, reports Norwegian IT site Dagens IT (found via The Next Web).
The passwords were shared via a Russian hacker site, and security researcher Per Thorsheim confirms that the leak is legit.
LinkedIn hasn't offered any statement on the incident at the time of this writing, but we would strongly suggest changing your password