Awfully ranty. I'll attempt to summarize: - JavaScript now optional but discouraged. Author surmises this will be abused, decries feature creep. - No r

Awfully ranty. I'll attempt to summarize: - JavaScript now optional but discouraged. Author surmises this will be abused, decries feature creep. - No required Unicode glyph coverage. Thus even though content is UTF-8 or UTF-16, you still can't rely on readers actually supporting the glyphs you want to use. - Author laments reader software that fails to implement EPUB-specific features and practical result of same. The specific case of a certain fruit company is vividly rendered in an extended metaphor. - A list of smaller features is discussed in brief. MathML support is probably the most interesting to HN. - Cannonical Fragment Identifiers. A scheme for identifying *any* location inside an EPUB document, is described as over-engineered and unlikely to be implemented by anybody.