So, I've been using this as a New Arrivals part of my home page to display those products that have the most recent 'Set Product as New From Date' and 'Set Product as New To Date' parameters set up. I've been using this on our new website for over a month, and it was working fine until yesterday, when it just started not displaying any products anymore.
The code on the home page is:
<div>{{block type="catalog/product_new" template="webandpeople/smartcatalog/list-new.phtml" image_width="150" image_height="150" column_width="170" products_count="8" cache_lifetime="1"}}</div>
Using Grayscale Full-width 2014 theme. Magento 1.7.0.2. I've already checked to make sure cache has been flushed. The ONLY thing I did recently was to add a new category that was partially hidden from certain customer groups (using the Netzarbeiter Extensions Groups Catalog 2 extension), but I even deleted that new category and reflushed cache again. Still doesn't display any new products with that code.