Index: mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkGeneralPreferencePage.cpp
===================================================================
--- mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkGeneralPreferencePage.cpp	(revision 25348)
+++ mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkGeneralPreferencePage.cpp	(working copy)
@@ -84,3 +84,9 @@
 //   if(_GeneralPreferencesNode.IsNotNull())
 //     m_StartMaximized->setChecked(_GeneralPreferencesNode->GetBool("startMaximized", false));
 }
+
+void QmitkGeneralPreferencePage::FlushPreferences()
+{
+  // Does not have a flush method
+  /*this->m_GeneralPreferencesNode.Flush();*/
+}
Index: mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkGeneralPreferencePage.h
===================================================================
--- mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkGeneralPreferencePage.h	(revision 25348)
+++ mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkGeneralPreferencePage.h	(working copy)
@@ -68,6 +68,12 @@
   /// \see IPreferencePage::Update()
   ///
   virtual void Update();
+
+   /**
+   * @see berry::IPreferencePage::FlushReferences()
+   */
+  void FlushPreferences();
+
 protected:
   berry::IPreferences::WeakPtr m_GeneralPreferencesNode;
   //QCheckBox* m_StartMaximized;
Index: mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkPreferencesDialog.cpp
===================================================================
--- mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkPreferencesDialog.cpp	(revision 25348)
+++ mitk/CoreUI/Bundles/org.mitk.gui.qt.common/src/QmitkPreferencesDialog.cpp	(working copy)
@@ -335,7 +335,8 @@
   {
     prefPage = it->prefPage;
     if(prefPage)
-      prefPage->PerformOk();
+      if(prefPage->PerformOk())
+        prefPage->FlushPreferences();
   }
   
   this->done(QDialog::Accepted);