Face blindness (from ABC news)

No familiar faces

About 1 in 50 people are "face blind"; some can't even recognize their loved ones.

And I am one of them, so if I didn't say hi to you, sometime its not because I am proud or whatever, it just that I'm "face blind"...please, please tap me or call me.... and kindly forgive me if there's such incident... :) :p