If you have an article to hide in a sub-folder of the node set in RootNodeList, the article is not hidden.

Steps to reproduce

1. Create content.ini.append.php in override with the following settings

<?php /*
[HideSettings]
RootNodeList[]
RootNodeList[]=2
HideDateAttributeList[]
HideDateAttributeList[article]=hidedate
*/ ?>

2. Create a cronjob.ini.append.php in override with the following:

[CronjobPart-hide]
Scripts[]=hide.php

3. Edit the article class adding a "Date time" attribute, with identifier (hidedate)
4. Create a Folder name "News"
5. Create an article not to hide (no data in hidedate attribute)
6 Create an article to hide (with hide date 2011.01-01 12:00)
7. Run the hide cronjob ($php runcronjobs.php hide)

Note: the cronjob works if you change RootNodeList[]=2 (eZPublish Folder) to the NodeId of the News folder