Is there any way to signify that a code block ends a paragraph?
There's a related prior org-mode issue where in some cases you don't want to start a new paragraph.
I ran into this issue with my blog at http://www.railsonmaui.com. I worked around this issue by editing the octopress scss file _syntax.scss, as I described here: http://www.railsonmaui.com/blog/2013/04/27/octopress-setup-with-github-and-org-mode/