Initializers broken after ember-cli update

After updating ember-cli from 0.4.4 to 0.4.6 (also ran ember init…) I get the following error when trying ember server:

Line 3: Unexpected token :
Error: Line 3: Unexpected token :
    at throwError (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:2131:21)
    at throwUnexpected (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:2193:9)
    at consumeSemicolon (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:2284:13)
    at parseStatement (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:4147:9)
    at parseStatement (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:4142:27)
    at parseSourceElement (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:4669:20)
    at parseStatementList (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:3314:25)
    at parseBlock (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:3329:17)
    at parseStatement (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:4084:24)
    at parseSourceElement (my-project\node_modules\ember-cli\node_modules\broccoli-es3-safe-recast\node_modules\es3-safe-recast\node_modules\esprima\esprima.js:4669:20)

After a lot of researching I found that the problem is my initializer for a service:

export default {
	name: 'growl-service',
  	initialize: function(container, app) {
		app.inject('controller', 'growl', 'service:growl');
   	}
};

If I comment out everything except the name, it starts the server fine, but obviously it fails an assert…

Any idea on what I’m doing wrong?

I’ve deleted the contents of node_modules, ran npm cache clear and npm update. It works again now.

… The level of fragility npm gives me is unbeatable…