Index: src/kio/kfiledialog.cpp
===================================================================
--- src/kio/kfiledialog.cpp
+++ src/kio/kfiledialog.cpp
@@ -326,8 +326,6 @@
 void KFileDialog::setMimeFilter(const QStringList &mimeTypes,
                                 const QString &defaultType)
 {
-    d->w->setMimeFilter(mimeTypes, defaultType);
-
     if (d->native) {
         QString allExtensions;
         QStringList filters = mime2KdeFilter(mimeTypes, &allExtensions);
@@ -335,7 +333,9 @@
             filters.prepend(allExtensions + QLatin1Char('|') + i18n("All Supported Files"));
         }
         d->native->filter = filters.join(QLatin1String("\n"));
+        return;
     }
+    d->w->setMimeFilter(mimeTypes, defaultType);
 }

 void KFileDialog::clearFilter()
@@ -385,6 +385,9 @@
 // This is only used for the initial size when no configuration has been saved
 QSize KFileDialog::sizeHint() const
 {
+    if (d->native) {
+        return QSize();
+    }
     return d->w->dialogSizeHint();
 }

@@ -601,6 +604,9 @@

 void KFileDialog::setConfirmOverwrite(bool enable)
 {
+    if (d->native) {
+        return;
+    }
     if (operationMode() == KFileDialog::Saving) {
         d->w->setConfirmOverwrite(enable);
     }
@@ -869,26 +875,41 @@

 QPushButton *KFileDialog::okButton() const
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w->okButton();
 }

 QPushButton *KFileDialog::cancelButton() const
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w->cancelButton();
 }

 KUrlComboBox *KFileDialog::locationEdit() const
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w->locationEdit();
 }

 KFileFilterCombo *KFileDialog::filterWidget() const
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w->filterWidget();
 }

 KActionCollection *KFileDialog::actionCollection() const
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w->actionCollection();
 }

@@ -967,11 +988,17 @@

 KToolBar *KFileDialog::toolBar() const
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w->toolBar();
 }

 KFileWidget *KFileDialog::fileWidget()
 {
+    if (d->native) {
+        return 0;
+    }
     return d->w;
 }