Thanks guys!
Actually this is more of an experiment on how forum participation affect SERP. The posts use to have titles with "targeted link backs" - during the time we held the top position for that key phrase. I decided to change future title posts with "targeted backlinks" (which we never ranked for before) on the title to see if it will affect SERP. After a month, I saw that we were ranking #1 (sometimes #2) for the latter key phrase and lost ranking for the former.
