This one from Living Social just arrived in my inbox.
LivingSocial recently experienced a security breach on our computer systems that resulted in unauthorised access to some customer data from our servers. We are actively working with the authorities to investigate this issue.
The information accessed includes names, email addresses, the date of birth of some users, and encrypted passwords; technically ‘hashed’ and ‘salted’ passwords. We never store passwords in plain text.
The database that stores customer credit card information was not affected or accessed.
Although your LivingSocial password would be difficult to decode, we want to take every precaution to ensure that your account is secure, so we are expiring your old password and requesting that you create a new one.