A Project->Clean should take care of this.
Edit: If a clean build didn't help, can you try replacing the XML
file in question with the following contents (create a new file):
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/save_tea"
android:title="@string/save_tea_label" />
</menu>
The only thing I can think of is that a weird character got in there somehow (copy/paste?).