Hi @kjroelke,
Would you mind first updating to the latest point release? There was an issue where sometimes custom fields wouldn’t pull through if a post looper was used on the page (like one of the Posts elements). That could be what you’re experiencing here.
Otherwise, could you explain a bit more about how your custom field is setup? Is is a WordPress Custom Field, or from a plugin? For a bit of context, if we look at this:
{{dc:post:meta key="meta_key"}}
It will basically do this under the hood:
get_post_meta( $post->ID, 'meta_key', true );
It should simply output a string representation of whatever is stored there. If nothing outputs, it could be because of the aforementioned bug (fixed in the latest point release) or perhaps that nothing is in fact stored in the field.