In Facebook, my Wall would show “Recent activity,”  reporting comments I left on other people’s pages. Today, when I clicked the little “x” next to one of the lines that reported a recent comment, I got an option to  “Hide all comment activity.”  I clicked it and ALL of the link posts disappeared from my wall.  If you did the same, here’s HOW TO FIX IT: From your profile page, scroll down to bottom and choose ‘Edit Options’ in the light blue bar.  Then you should see “Comment Activity,”  uncheck that and click save.