There are a number of white spaces items that are common in word processing and in typesetting and layout work that will not hold when exporting to EPUB. These include:
• Tabs
• Double word spaces
• Em-space, en-space, thin space and other kinds of spaces
• Empty paragraph returns before or after a heading or paragraph
In general, if you need space around an item the best practice is to build it into a paragraph style sheet. Avoid empty white space items as a way to build a page.
