Howdy,

The example for hook_block_node_visibility() in the README suggests creating an array of paths, and then testing the array key against arg(0)

If you have a content type with the same machine name as a path you want to include, the array key in the hook will overwrite the array key for the content type, and the content type will not be listed in the 'Node type specific visibility settings' section.

For example, if you have a content type named 'blog', and a views page that lists all the blog entries at path 'blog', you'll run into trouble if you add a 'blog' key to the array in hook_block_node_visibility()

There are numerous ways to work around this, but it might be worth adding a note to the readme that the array keys added in the hook must be distinct from content type machine names.