I have this code it was working well befor upgrade to Magento Community Edition 1.9.2.4 and all codes like this {{block ......}} are not working now after upgrade. This is one of them:
{{block type="catalog/product_list" category_id="3" template="catalog/product/list-home.phtml" column_count="3" products_count="3"}}
You can configure allowed variables and blocks in System > Permissions > Blocks
and System > Permissions > Variables
.
you have to add catalog/product_list
block there.
This feature was added in Community Edition 1.9.2.2 and Magento Enterprise Edition 1.14.2.2