I'm updating my app with the new Toolbar from the support library v21. My problem is that the toolbar does not cast any shadow if I don't set the "elevation" attribute. Is that the normal behavior or I'm doing something wrong? My code is: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientati