Index: kdelibs/kio/kio/kprotocolmanager.cpp
===================================================================
--- kdelibs/kio/kio/kprotocolmanager.cpp	(revision 791111)
+++ kdelibs/kio/kio/kprotocolmanager.cpp	(working copy)
@@ -226,7 +226,10 @@
   else if (scheme == "webdavs")
     scheme = "https";
 
-  return config()->group("Proxy Settings" ).readEntry( scheme + "Proxy", QString() );
+  QString proxy = config()->group("Proxy Settings" ).readEntry( scheme + "Proxy", QString() );
+  if (proxy.startsWith("//:"))
+    return QString();
+  return proxy;
 }
 
 QString KProtocolManager::proxyForUrl( const KUrl &url )
