Large page count when paginating an association along with deep conditions

Example:

@author.articles.paginate(:all, :include => :comments, :conditions => "comments.approved = true", :page => params[:page])

Will issue an errant "count" sql that does not include a "FROM" clause or proper condition for the inner-most "comments" association. Under postgresql:

• The DB notices that the condition references "comments.*" so it happily reports "NOTICE: adding missing FROM-clause entry for table "comments""
• The resulted count is absurdly large since all comments were multiplied by the left query instead of being explicitly scoped by comments.article_id = articles.id
• Causing .page_count to be extremely large