One of the awesomest feature of the Android 4.0, The Ice Cream Sandwich version of the Android OS has been the Face unlock feature, where, the phone unlocks itself using the front camera which it detects you as the owner of the phone using the camera as the input.
Guess what, it has been compromised, this below video shows you that you can unlock the phone using the photo of the person, that IS a serious security flaw and instantly makes the feature useless
Do let us know what you think about it.