I found totally 613 not found URLs like these in my GWT. By googling I observed that these links generated by CMS like wordpress, joomla,drupal... And one more thing, this blog was created 6 months ago,, now it has traffic around 500 visitors/Day and 1300 page views/day.. Still, i'm unable to get google ad-sense approval. I ever go for spamming or breaking policies..
May be these bad links were the reason behind these..
Guide me regarding these issues..
[edited by: lorax at 12:17 pm (utc) on Apr 1, 2013] [edit reason] remove link and email snippet [/edit]