diff --git a/libkdepim/prefs/kprefsdialog.cpp b/libkdepim/prefs/kprefsdialog.cpp
--- a/libkdepim/prefs/kprefsdialog.cpp
+++ b/libkdepim/prefs/kprefsdialog.cpp
@@ -121,6 +121,7 @@
 void KPrefsWidBool::readConfig()
 {
     mCheck->setChecked( mItem->value() );
+    mCheck->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidBool::writeConfig()
@@ -168,6 +169,7 @@
 void KPrefsWidInt::readConfig()
 {
     mSpin->setValue( mItem->value() );
+    mSpin->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidInt::writeConfig()
@@ -217,6 +219,7 @@
 void KPrefsWidColor::readConfig()
 {
     mButton->setColor( mItem->value() );
+    mButton->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidColor::writeConfig()
@@ -264,6 +267,7 @@
 void KPrefsWidFont::readConfig()
 {
     mPreview->setFont( mItem->value() );
+    mPreview->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidFont::writeConfig()
@@ -319,6 +323,7 @@
 void KPrefsWidTime::readConfig()
 {
     mTimeEdit->setTime( mItem->value().time() );
+    mTimeEdit->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidTime::writeConfig()
@@ -368,6 +373,7 @@
 void KPrefsWidDuration::readConfig()
 {
     mTimeEdit->setTime( mItem->value().time() );
+    mTimeEdit->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidDuration::writeConfig()
@@ -411,6 +417,7 @@
     }
     mDateEdit->setDate( mItem->value().date().isValid() ?
                             mItem->value().date() : QDate::currentDate() );
+    mDateEdit->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidDate::writeConfig()
@@ -470,6 +477,7 @@
     if ( !mGroup->button( mItem->value() ) )
         return;
     mGroup->button( mItem->value() )->setChecked( true );
+    mGroup->button(mItem->value())->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidRadios::writeConfig()
@@ -500,6 +508,7 @@
 void KPrefsWidCombo::readConfig()
 {
     mCombo->setCurrentIndex( mItem->value() );
+    mCombo->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidCombo::writeConfig()
@@ -550,6 +559,7 @@
 void KPrefsWidString::readConfig()
 {
     mEdit->setText( mItem->value() );
+    mEdit->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidString::writeConfig()
@@ -602,6 +612,7 @@
 void KPrefsWidPath::readConfig()
 {
     mURLRequester->setUrl( KUrl( mItem->value() ) );
+    mURLRequester->setEnabled(!mItem->isImmutable());
 }
 
 void KPrefsWidPath::writeConfig()