Dismiss the dialog in onDestroy so that it doesn't leak on orientation change or other transitions.
diff --git a/src/com/android/settings/ApplicationSettings.java b/src/com/android/settings/ApplicationSettings.java
index 85fe11f..6a8aa81 100644
--- a/src/com/android/settings/ApplicationSettings.java
+++ b/src/com/android/settings/ApplicationSettings.java
@@ -53,6 +53,14 @@
     }
 
     @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        if (mWarnInstallApps != null) {
+            mWarnInstallApps.dismiss();
+        }
+    }
+
+    @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
         if (preference == mToggleAppInstallation) {
             if (mToggleAppInstallation.isChecked()) {