diff -uNr qgis-1.4.0/src/core/qgscoordinatereferencesystem.cpp qgis-1.4.0-qt47/src/core/qgscoordinatereferencesystem.cpp
--- qgis-1.4.0/src/core/qgscoordinatereferencesystem.cpp	2010-07-08 02:11:17.653725525 +0200
+++ qgis-1.4.0-qt47/src/core/qgscoordinatereferencesystem.cpp	2010-07-08 02:57:33.313600187 +0200
@@ -47,7 +47,7 @@
 QgsCoordinateReferenceSystem::QgsCoordinateReferenceSystem()
     : mMapUnits( QGis::UnknownUnit ),
     mIsValidFlag( 0 ),
-    mValidationHint( 0 )
+    mValidationHint()
 {
   mCRS = OSRNewSpatialReference( NULL );
 }
@@ -55,7 +55,7 @@
 QgsCoordinateReferenceSystem::QgsCoordinateReferenceSystem( QString theWkt )
     : mMapUnits( QGis::UnknownUnit ),
     mIsValidFlag( 0 ),
-    mValidationHint( 0 )
+    mValidationHint()
 {
   mCRS = OSRNewSpatialReference( NULL );
   createFromWkt( theWkt );
@@ -65,7 +65,7 @@
 QgsCoordinateReferenceSystem::QgsCoordinateReferenceSystem( const long theId, CrsType theType )
     : mMapUnits( QGis::UnknownUnit ),
     mIsValidFlag( 0 ),
-    mValidationHint( 0 )
+    mValidationHint()
 {
   mCRS = OSRNewSpatialReference( NULL );
   createFromId( theId, theType );
diff -uNr qgis-1.4.0/src/core/qgshttptransaction.cpp qgis-1.4.0-qt47/src/core/qgshttptransaction.cpp
--- qgis-1.4.0/src/core/qgshttptransaction.cpp	2010-07-08 02:11:17.634633912 +0200
+++ qgis-1.4.0-qt47/src/core/qgshttptransaction.cpp	2010-07-08 02:08:03.768600629 +0200
@@ -45,10 +45,10 @@
                                         QNetworkProxy::ProxyType proxyType,
                                         QString userName,
                                         QString password )
-    : httpresponsecontenttype( 0 ),
+    : httpresponsecontenttype(),
     httpurl( uri ),
     httphost( proxyHost ),
-    mError( 0 )
+    mError()
 {
   QSettings s;
   mNetworkTimeoutMsec = s.value( "/qgis/networkAndProxy/networkTimeout", "20000" ).toInt();
diff -uNr qgis-1.4.0/src/core/qgsmessageoutput.cpp qgis-1.4.0-qt47/src/core/qgsmessageoutput.cpp
--- qgis-1.4.0/src/core/qgsmessageoutput.cpp	2010-07-08 02:11:17.628600247 +0200
+++ qgis-1.4.0-qt47/src/core/qgsmessageoutput.cpp	2010-07-08 02:08:40.298600356 +0200
@@ -44,7 +44,7 @@
 // QgsMessageOutputConsole
 
 QgsMessageOutputConsole::QgsMessageOutputConsole()
-    : mMessage( NULL )
+    : mMessage()
 {
 }
 
diff -uNr qgis-1.4.0/src/core/qgsvectorlayer.h qgis-1.4.0-qt47/src/core/qgsvectorlayer.h
--- qgis-1.4.0/src/core/qgsvectorlayer.h	2010-07-08 02:11:17.615600358 +0200
+++ qgis-1.4.0-qt47/src/core/qgsvectorlayer.h	2010-07-08 02:22:35.046600640 +0200
@@ -91,8 +91,8 @@
     };
 
     /** Constructor */
-    QgsVectorLayer( QString path = 0, QString baseName = 0,
-                    QString providerLib = 0, bool loadDefaultStyleFlag = true );
+    QgsVectorLayer( QString path = QString(), QString baseName = QString(),
+                    QString providerLib = QString(), bool loadDefaultStyleFlag = true );
 
     /** Destructor */
     virtual ~QgsVectorLayer();
@@ -107,7 +107,7 @@
     QString dataComment() const;
 
     /** Set the primary display field to be used in the identify results dialog */
-    void setDisplayField( QString fldName = 0 );
+    void setDisplayField( QString fldName = QString() );
 
     /** Returns the primary display field name used in the identify results dialog */
     const QString displayField() const;
diff -uNr qgis-1.4.0/src/plugins/grass/qgsgrassmapcalc.h qgis-1.4.0-qt47/src/plugins/grass/qgsgrassmapcalc.h
--- qgis-1.4.0/src/plugins/grass/qgsgrassmapcalc.h	2010-07-08 02:11:18.125600853 +0200
+++ qgis-1.4.0-qt47/src/plugins/grass/qgsgrassmapcalc.h	2010-07-09 12:34:31.686962175 +0200
@@ -219,8 +219,8 @@
 
     QgsGrassMapcalcFunction() {};
     QgsGrassMapcalcFunction( int type, QString name, int count = 2,
-                             QString description = 0, QString label = 0,
-                             QString labels = 0, bool drawLabel = true );
+                             QString description = QString(), QString label = QString(),
+                             QString labels = QString(), bool drawLabel = true );
     ~QgsGrassMapcalcFunction() {};
 
     QString name() { return mName; }
@@ -331,7 +331,7 @@
     ~QgsGrassMapcalcObject();
 
     // Set map name, constant value or function/operator
-    void setValue( QString val, QString lab = 0 );
+    void setValue( QString val, QString lab = QString() );
 
     // Set function
     void setFunction( QgsGrassMapcalcFunction f );
diff -uNr qgis-1.4.0/src/plugins/grass/qgsgrassmodule.cpp qgis-1.4.0-qt47/src/plugins/grass/qgsgrassmodule.cpp
--- qgis-1.4.0/src/plugins/grass/qgsgrassmodule.cpp	2010-07-08 02:11:17.914600309 +0200
+++ qgis-1.4.0-qt47/src/plugins/grass/qgsgrassmodule.cpp	2010-07-09 13:27:12.574961370 +0200
@@ -1946,7 +1946,7 @@
     QWidget * parent )
     : QgsGrassModuleGroupBoxItem( module, key, qdesc, gdesc, gnode, parent ),
     mModuleStandardOptions( options ),
-    mGeometryTypeOption( 0 ), mVectorLayerOption( 0 ),
+    mGeometryTypeOption( QString() ), mVectorLayerOption( QString() ),
     mRegionButton( 0 ), mUpdate( false ), mRequired( false )
 {
   QgsDebugMsg( "called." );
@@ -2581,7 +2581,7 @@
   QgsGrassModule *module, int type, QString key, QDomElement &qdesc,
   QDomElement &gdesc, QDomNode &gnode, QWidget * parent )
     : QgsGrassModuleGroupBoxItem( module, key, qdesc, gdesc, gnode, parent ),
-    mType( type ), mOgrLayerOption( 0 ), mOgrWhereOption( 0 )
+    mType( type ), mOgrLayerOption( QString() ), mOgrWhereOption( QString() )
 {
   if ( mTitle.isEmpty() )
   {
diff -uNr qgis-1.4.0/src/providers/wms/qgswmsprovider.cpp qgis-1.4.0-qt47/src/providers/wms/qgswmsprovider.cpp
--- qgis-1.4.0/src/providers/wms/qgswmsprovider.cpp	2010-07-08 02:11:18.200725039 +0200
+++ qgis-1.4.0-qt47/src/providers/wms/qgswmsprovider.cpp	2010-07-09 02:13:01.258782364 +0200
@@ -60,7 +60,7 @@
     cachedPixelHeight( 0 ),
     mCoordinateTransform( 0 ),
     extentDirty( TRUE ),
-    mGetFeatureInfoUrlBase( 0 ),
+    mGetFeatureInfoUrlBase(),
     mLayerCount( -1 )
 
 {
diff -uNr qgis-1.4.0/src/providers/wms/qgswmsprovider.h qgis-1.4.0-qt47/src/providers/wms/qgswmsprovider.h
--- qgis-1.4.0/src/providers/wms/qgswmsprovider.h	2010-07-08 02:11:18.200725039 +0200
+++ qgis-1.4.0-qt47/src/providers/wms/qgswmsprovider.h	2010-07-08 10:49:46.516564676 +0200
@@ -341,7 +341,7 @@
     *                otherwise we contact the host directly.
     *
     */
-    QgsWmsProvider( QString const & uri = 0 );
+    QgsWmsProvider( QString const & uri = QString() );
 
     //! Destructor
     virtual ~QgsWmsProvider();