Well, that didn't take long. Yesterday, I posted a message that Face.com which makes facial recognition software had been acquired by Facebook and that the potential existed for misuse by the latter company, link here

Today, it appears that there was a significant security vulnerability in Face.com which had the potential to hijack users accounts both on Facebook and Twitter. The flaw was patched before details were released to safeguard users accounts, but it makes interesting reading: Security hole in Face.com