We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
What are your thoughts on having Justified text, or non justified text for your projects?. The first book I published, I had the text nicely square, but had differing spaces in between some words. I am nearly ready to publish my second book now, and having second thoughts on using this approach again for this new project. Evenly spaced words looks pleasing also, eep dilemma.