Cordova/plugin_list - module.exports are always empty

When i tested the apps in desktop browser (version Cordova 3.0.0) i don't received any error. when i update Cordova i note that the file "cordova_plugins.js" has variable empty ("module.exports" is empty array). Before the update this file contained the list of installated plugins.
Why is now empty?

This problem causes the fact that I receive the error "navigator.connection is undefined"

/////////////////////////////////////

Old Cordova - after installations a plugin

cordova.define('cordova/plugin_list', function(require, exports, module) {
module.exports = [
[...]

{ "file": "plugins/org.apache.cordova.network-information/www/network.js", "id": "org.apache.cordova.network-information.network", "clobbers": [ "navigator.connection", "navigator.network.connection" ] }

,
[...]
]
});

/////////////////////////////////////

Cordova 3.3.0

cordova.define('cordova/plugin_list', function(require, exports, module)

{ module.exports = []; module.exports.metadata = // TOP OF METADATA {}

// BOTTOM OF METADATA
});