Drupal 7 "Panel Nodes" Content Pane Contextual Filter Does anyone know how to set up a taxonomy-based contextual filter (argument) for a Views Content Pane that is going to be displayed in a "Panel Node" (from the "Panel Node" module that comes with Panels) tagged with the same taxonomy term? 

I think I am missing something about how "Panel Nodes" works. I don't get the option for a term ID unless I add a "Relationship" to the taxonomy field in Views. Then I can set the Contextual Filter to the term ID, but it does not work consistently. If I set the "Argument Input" for the pane to "From Context", it works in Views preview with an argument, but it's blank on the actual Panel Node (if the Pane even shows up to be added). If I set it to anything other than "No Argument", it doesn't work at all. 

When I use an argument to preview the Content Pane in Views, it works as it should. But on the "Panel Node" page, it's blank. I don't think the argument is making it to the pane.

Some background: 
"Panel Nodes" is a module that comes with Panels and it creates this Panel-ified content type, but I'm finding very little documentation on how to use it. Panel Nodes are not in Page Manager and so you cannot set a context for them there. 

I have a client that could use Panels in their Drupal 7 site just for one particular kind of content type. For this particular use case, the the "Panel Nodes" way of generating the content is the most intuitive for the client (enter a title, body, an image into a node add form, and then click on the Panels Layout and Panels Content tabs right from the node form; I believe this is a similar model to the way http://drupal.org/project/panelizer is supposed to work).
I urge you not to use Panel Nodes. Panel Nodes are being deprecated in favor of Panelizer. The largest hurdle to getting rid of them is that I need to complete the upgrade path. I suggest that you


Move to Panelizer, following the upgrade path issue if you already have Panel Nodes.
If necessary, repost a new question with regard to Panelizer.