I've followed another post on how to do uploads in a JSR-168 portal and have it working _successfully_ in uPortal 18.104.22.168 (which Luminis 4 is based on, right?).
When the portlet is deployed to Luminis 4 everything except the file upload works correctly.
The application has other forms in the portlet that work fine. What seems to be the difference is that this form has a multipart/form-data enctype attached to it.
Upon submission the application sees all of the values as non-existent. They just disappear.
The system I'm testing on is running Luminis 22.214.171.124 .
Is there a system configuration that is missing that prevents multipart/form-data submissions?