I have a strange problem that all my visitors are saying that when they click on the page 2, 3, 4 or next page of my pagination. Downloading starts automatically and this problem does not happen when i logged in as admin. This problem also does not happen for categories pages accept on the home page. I have also attached the jpeg.
My website: http://www.designbolts.com
Another thing i have noticed that when i disable wp super cache and then enable it the problem goes for few minutes and then it comes back again after sometime.