- Open the Content Type of the Content you are listing (it is important that you do this in the content type so it is locked to this content type)
 - Create a new field that is a "select dynamic"
 - Change the Query to "free"
 - Enter the following code
SELECT b.avatar AS text, a.id AS value
FROM #__users AS a
LEFT JOIN #__cck_store_form_users AS b ON b.id = a.id - Make sure the storage is Standard > Article > created_by
 - Save your field.
 - Add your field to the view you want the Avatar to display on (Content, Item or List).
 - Apply the "HTML" typography and write the HTML code - remember to replace my_field with your actual field name:
 
	 <img src= "$cck->getText('my_field')">
With thanks to Alain L for the initial question on the forums