I can't see one of my facebook friend's posts at the "posts by friends" section, though I see them at his wall?

[960]

I can see his posts and his activity at his faceboo news feed and his wall but when I enter his name at the facebook search engine for the section "posts by friends" none of his posts show up. This problem has been brought about the last month. Previously everything was OK. However, when I enter other facebook friends' names their posts are shown at "posts by friends" search engine results as well as at their facebook news feed and their own wall. So what could have possibly happened? I don't think he blocked me, since I can still see his everyday posts and activity. The problem is only at the section "posts by friends".

[purplenurple .]

Maybe because he took off his wall on Facebook. and only POSTS by him can be shown. Or its on another tab. its usually "_____+ friends" , ____________, and posts by friends.