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.
Image dimensions for uploading an image for ebook cover
Just wanted to check the dimensions when uploading an image to replace the default cover for an ebook.
Is it 500 pixels x 500 pixels?
What other considerations / exclusions apply when uploading an image to the ebook wizard to create a new cover?