I wanted to have all images added to root folder moved to 'Images' folder, so I added a content rule:
(If content type 'Image', move to folder 'Images'.
This is not working.
Is there a difference between folders and 'site folder'?
Are the content rules supposed to work here ?
Can you reproduce in http://demo.plone.de/? I couldn't. Beware if you're using a multilingual site that the rule must be applied to root and all subfolders or specifically to each language root (e.g. /en/).
From your screenshot you're registering the trigger as Comment added. You should go with Object added to this container since an added comment will never be of type Image.