I have tested with a blank install and changed the following files as follows:

resources/templates/config.edn

{...
  :blocks-per-preview 10
  :previews? true
 ...}

resources/templates/md/posts/docs.md

 :layout :post
 :tags  ["cryogen"]
 :toc true}

This intro only documents a subset of Cryogen's features. For additional documentation please see the [cryogen site](http://cryogenweb.org).
<!--more-->
## Features
...

The blog index page looks as follows (clearly not cutting off after the first line)

Please let me know if I have done something incorrect here which is causing the marker to not be recognized.

Thanks!