Editor access rules

Howdy,

Pardon if this question has been asked before. (http://drupal.org/node/52875)

I'm trying to institute a content creation workflow in my drupal site. I created the following roles with the following responsibilities:

1. Contributor - someone who writes and edits their own content but does not have permission to publish
2. Editor - someone who can view all content, edit but not publish
3. Publisher - someone who views, edits and publishes content

I've been able to set up 1 and 3, but I found that even when I set up 2 (Editor) and give this role all "Edit [page-type]" permissions, it can only see published content?

Is there a way for anyone without Administer nodes permission (which provides the Publish option) to view and edit unpublished revisions?

Thanks in advance :)