My son told me that YouTube was suddenly blocked on his iPod. I logged into my Premium account, chose his profile, and selected Edit filter settings. Sure enough, YouTube was blocked. When I enabled it, though, the sub-category menu was not available. In fact, the sub-category menus aren't available for any categories.
The on-line help (http://content.mobicip.com/content/how-customize-your-internet-using-mob...) clearly states "Click on each category to expand the sub-categories."
What happened? Is the sub-category feature no longer available?