I would like to be able to specify in your Plugin Settings, the ability to use the 404.php instead of a generic error.
In UAM > Settings > Post settings > Post content
In UAM > Settings > Page settings > Page content
I would like to be able to redirect the error pages to the theme's default 404.php error - you know, it would be like the page didn't really exist ;-)
You should have an option in your settings to choose the generic ERROR or to use the 404 error.