The Microsoft Exchange vulnerability debacle, which has been reported on to extensively by The Hacker
Our friends over at ZDNet just released another report on Facebook and their ongoing security woes. This time, Facebook has been caught asking users to confirm their identity by entering their email address and their password for their email service provider so that the platform can login to handle this confirmation. It goes without saying that anyone asking you for the user name and password you use at another service provider is not looking out for your best interests. With Facebook asking for these credentials and their recent issues, you know they are definitely not looking out for your best interests.
TL;DR – Don’t give Facebook your credentials to other services. It’s bad.