This plugin marks edited posts as unread by change date, if the post is last in topic.
Plugin can change date only if new content is "unlike" the old.

Administrator from ACP can set several options:

• Check post message
  
• Minimum similarity for message
  
• Check post subject
  
• Minimum similarity for subject
  
• Minimum time interval for compare
  
• Maximum time interval for compare
  
• Check post author