Found more interesting pictures...guess these are pictures of entries on address book. But strangely, my own entry's picture is not found in that folder (shown on address book though). I was able to drag the picture to desktop, it's only 96x96 though. At this point, I am willing to think this is just a bug on 10.7.2. The new picture should have taken over the original. And while the original still shows on profile picture, address book and ichat, I should be able to locate it. So this is just weird, to say the least.
Could the original pic be a hidden file? anyway to make it show the hidden files?
Anyway, i am considering of restoring the picture from my time machine backup, do you think i will have any luck doing that? Is there a way i can restore a certain folder instead of the entire system?