I don't believe that. I think Maybe backlink for your post isn't clear. Maybe, it's not good website . such as sexual website , this not get good backlink sure. Please change to goods web-site and good informative web site is better , One time spend post and get more PR and Backlink.
Where exactly have you been posting at? B/c google loves links, I wish I had it the link but, there is a tool that can evalulate your backlinks and tell you if the search engines see it as spam, matter fact I remember, check out the bad neighborhood tool and run your site thru it, it will pick up links you did not know you even had, and clearly mark next to it "SPAM" and then you need to try to get it removed ASAP.