Finally tracked down a very annoying bug...

Symptom: When using the media browser (by clicking the SlideShowPro button while editing a post), the plugin will bring up an empty list of photos, albums, and galleries. It will only show an empty "Recently Uploaded."

Cause: My theme uses a custom "Featured Image" size, named "'940x200" and the plugin cannot handle any sizes named beginning with a number. For example:

add_image_size( '940x200', 940, 200, true ); // 940x200 image size

While this is not a valid class name in CSS, Wordpress does not prevent it. Not surprisingly, it causes a Javascript parse error in the the Javascript code for the media browser in the SlideShowPro plugin.

Workaround: Don't use sizes with numbers in the name. Lol.

Recommendation: A sanity check just incase.. [Would have saved a lot of time fixing the theme in order to get SSP Director Wordpress plugin to work ]