You might want to change your LinkedIn password.  A list of 6.5 Million password hashes from LinkedIn has been leaked.  Although a hash is not the same as the plain text password, it can be used to gain access to your account.

I checked the list, and thankfully the hash for my password doesn't appear.

Source: http://news.ycombinator.com/item?id=4073309 and http://it.slashdot.org/story/12/06/06/1335228/linkedin-password-hashes-leaked-online

LinkedIn has confirmed the leak, and has invalidated affected passwords.  http://blog.linkedin.com/2012/06/06/linkedin-member-passwords-compromised/

However, here comes the tricky part.  They will be sending out an email to affected accounts instructing them to reset their passwords, BUT a phishing scam is currently underway tricking people into doing much the same thing!  How do you know which email to heed?

Never "Click here" in an email.  Any legitimate site that sends you a "Click here" email should be slapped.  Always go directly to the trusted site and follow whatever instructions are applicable for the task at hand.  If there IS a url you must follow (eg, validation email) copy and paste the link text into a browser address bar.  Then MAKE SURE the text you pasted goes to the trusted site you expected, not some slightly / wildly different URL.