Best Answer Danny , 29 March 2013 - 12:00 PM
The only way this issue can be caused is by invalid HTML on one of your posts that has an unclosed <div> or has a closed </div> which shouldn't be there. When you click on your previous posts link the issue is resolved. Therefore, the issue is definitely on one of the posts on the first blog page.
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I recommend you go through each of your posts and review any custom HTML you have added.