Symptoms

We have a solution on both DEV and PRD environments (similar in both instances). And on one of the forms, there is a button to generate a PDF from the URL.
While on DEV it is working perfectly.
The URL is built using the built-in "Smartforms Runtime SSL" url. It is set up the same as dev as prod.
 

Diagnoses

Create PDF from URL is not the recommended method.
Migrated functionality to a Save As PDF Control.
 

Resolution

Migrated functionality to a Save As PDF Control.
http://help.k2.com/onlinehelp/k2smartforms/userguide/1.0.7/default.htm_PDF_Control.html?Highlight=PDF control

A rendering issue occurred.
That was fixed with the info here:
http://help.k2.com/kb001378