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.
unwanted black background appears behind one image after submitting to lulu
I just submitted my first pdf to hulu. It includes a number of small black line drawings with white backgrounds. All came back fine except one, which is now embedded in a black box. The black background was not there in the original image, and it was not there when I converted the doc file to a pdf. The black background only appeared when I got my pdf back from lulu, and it only happened to one image. I have no idea why it happened or how to fix it.