In both the list of themes and in the theme editor, I am encountering the following PHP error:

Warning: in_array() expects parameter 2 to be array, boolean given in /home/pandora/public_html/art/zp-core/admin-functions.php on line 2619

This is a fresh install. I have tried re-installing with no change.

Zenphoto 1.4.1.4? Sorry, I have no idea and have not seen this before. How did you install Zenphoto?

What errors/warnings did setup give you?