We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Can't open Lulu files
I've always been able to open my files on Lulu (using epub.) I need to open to check on them after uploading to lulu. But suddenly I can't open my files anymore. I get a message stating that "The office xml filecannot be opened because there are problems with the content."
This applies to every file that I have on Lulu. All of the same files that I have stored in documents open with no trouble. Has anyone else run into this kind of problem, or know how to fix it?