All of the sudden, I just see that the comment on my wall post is gone, there are two possibilities, either the Commenter deleted it, or it’s another Facebook’s bug. Although the second option is very unlikely, but that’s what I found out.

When I go to my profile, the URL would look like this:

http://www.facebook.com/profile.php?id=[ number ]&ref=profile

However, when I go to my profile, and then click the Wall tab again, the URL would looks like this:

http://www.facebook.com/profile.php?id=[ number ]&ref=profile#/profile.php?id=1164166702&v=wall&ref=profile

See the difference? I could see the comments on the second URL, but not the first. I deleted all of my browsing histories and caches, and tested on both the latest release of Google Chromium and Mozilla Firefox browsers. Therefore, I conclude that this is definitely another Facebook’s bug. I don’t understand why there’s so many bugs that I could find in Facebook lately.