Index: src/app/qgsnewhttpconnection.cpp
===================================================================
--- src/app/qgsnewhttpconnection.cpp	(revision 12347)
+++ src/app/qgsnewhttpconnection.cpp	(working copy)
@@ -17,6 +17,7 @@
 /* $Id$ */
 #include "qgsnewhttpconnection.h"
 #include "qgscontexthelp.h"
+#include <QMessageBox>
 #include <QSettings>
 
 QgsNewHttpConnection::QgsNewHttpConnection(
@@ -51,6 +52,23 @@
 void QgsNewHttpConnection::accept()
 {
   QSettings settings;
+
+  // check for existing coection with the same name
+  settings.beginGroup( "/Qgis/connections-wms" );
+  QStringList keys = settings.childGroups();
+  if ( keys.contains( txtName->text() ) )
+  {
+    int res = QMessageBox::question( this,
+                                     tr( "Save connection" ),
+                                     tr( "Conection with name %1 already exists. Overwrite?" ).arg( txtName->text() ),
+                                     QMessageBox::Yes | QMessageBox::No );
+    if ( res != QMessageBox::Yes )
+    {
+      return;
+    }
+  }
+  settings.endGroup();
+
   QString key = mBaseKey + txtName->text();
   QString credentialsKey = "/Qgis/WMS/" + txtName->text();