At this time, we're investigating the problem and looking for a solution.
If you've encountered this issue while converting your file, we suggest attempting to create and upload an EPUB directly to our system.
While there are a number of EPUB conversion options, Calibre (Download Here) has shown the best results for creating an EPUB for the Lulu system. Please review their extensive Help resources (Found Here) to create an EPUB 2 that our system can validate.
We've also created this Forum Thread. Post questions here and we'll do our best to respond and assist.
Black and white images
The black and white images in my prof copy look a little washed out. They look fine in the PDF. I am using Apple Pages for the book layout. Pages allows you to make adjustments to exposure, contrast, highlights and shadow. I was looking for settings for these adjustments to improve the images. I did convert the images to gray scale. A shot of the Pages Adjust Image window is attached below.