More than 6 million LinkedIn passwords stolen:
http://money.cnn.com/2012/06/06/technology/linkedin-password-hack/index.htm?hpt=hp_t3
http://www.pcadvisor.co.uk/how-to/security/3362143/how-to-change-a-linkedin-password/
Loved this bit:
Countless passwords on the list contain the word “linkedin.”
How to change a LinkedIn password
Log into LinkedIn and click your name in the top right of the LinkedIn page.
Select “Settings” from the dropdown and choose “Change” next to Password.