This is what it says on the console window on the chrome browser:
For an example of a ionicon missing is the windows. BTW I started a tabs ionic starter.
lang.js:250Angular 2 is running in the development mode. Call enableProdMode() to enable the production mode.
(index):74 GET http://localhost:8100/assets/fonts/ionicons.woff2?v=3.0.0-alpha.3
plugin.js:33Native: tried calling StatusBar.styleDefault, but Cordova is not available. Make sure to include cordova.js or run in a device/simulator
(index):74 GET http://localhost:8100/assets/fonts/ionicons.woff?v=3.0.0-alpha.3
(index):1 GET http://localhost:8100/assets/fonts/ionicons.ttf?v=3.0.0-alpha.3