You need to clean up your entire Android project in Eclipse every time you edit an XML file

I have an unpleasant problem. I use Fragment in my Android project, and it causes me endless pain, because I have to clean up the project every time when I edit the main xml file. Here's what it looks like:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <fragment xmlns:map="http://schemas.android.com/apk/res-auto"
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        class="com.google.android.gms.maps.MapFragment"
        map:uiRotateGestures="false"
        map:uiScrollGestures="false"
        map:uiZoomControls="false"
        map:uiZoomGestures="false" 
        map:cameraZoom="18"
        />
    <ScrollView 
        android:id="@+id/scroller"
        android:layout_width="250dp"
        android:layout_height="100dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:background="@android:color/white">
    <TextView
        android:id="@+id/debug_text"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:textSize="10sp"

       />
    </ScrollView>
</RelativeLayout>

And if I edit even one character of this file, all lines starting with "map" will be highlighted in red, and the tag for opening the fragment will also be highlighted. The error I get is:

Unexpected namespace prefix "xmlns" found for tag fragment

And for lines starting with "map", the error is:

Unexpected namespace prefix "map" found for tag fragment

If I clean the project, the problem disappears, and I can create and run the project just fine, but since I am editing it a lot now, it is very very annoying. Can anyone help?