Easy Post Types Theming Not Working

I’ve been using Easy Post Types with Thematic and I’m impressed so far, except a frustrating issue regarding theming.

I have copied a theme file into my thematic child theme. This file is for theming custom textfield inputs and is called ‘theme-textfield-input.php’. The changes I have made to this file are not to be seen. Changing the original file (in easy-post-types/classes/custom-textfield)DOES affect changes to the way the admin displays the input.

I also tried putting the override file in the thematic parent theme (in case there was a thematic/child theme issue). No luck either.

Has anyone else encountered this problem?

If fixed, it’s another great reason not to use Drupal ??