Here's the documentation of the public API: http://nodejs.org/api/url.html#url_url_resolve_from_to http://nodejs.org/api/url.html#url_url_resolve_from_to They

Here's the documentation of the public API: http://nodejs.org/api/url.html#url_url_resolve_from_to http://nodejs.org/api/url.html#url_url_resolve_from_to They changed the way that it resolves: url.resolve('/path/to/file', '.') ... to include a trailing slash when it returns the new URL to your code. No big deal, but it breaks apps. It's not backwards compatible. SemVer is not about feature-vs-bugfix. It's about changes to documented behavior. This is a breaking change, so it must be Io.js 2.0. If you think I'm making a mountain out of a molehill here — I am. This change isn't a big deal. Io.js shouldn't have to bump to 2.0 to deal with it. But pretending to follow "Semantic" Versioning when you're not is just silly. Death to tyranny, right?