ZenphotoPress Version 1.7.4
Zenphoto version 188.8.131.52  (Official Build)
PHP version: 5.2.17
(a) ZP icon appears in the wysiwyg editor, but clicking it results in "page not found" message in the pop-up.
(b) Widget is available for use, but using it results in no images displayed.
(c) Manually inserting shortcode [zenphotopress] into WordPress page called Gallery results in no images being displayed.
I've tried with different themese on both WP and ZP.
I've tried with the ZenphotoPressErrorHandler set to ZP_E_ALL.
No debug comments, no errors, no images.