diff --git a/res/layout/installed_app_details.xml b/res/layout/installed_app_details.xml
index f623d04b650..d69f98a9052 100644
--- a/res/layout/installed_app_details.xml
+++ b/res/layout/installed_app_details.xml
@@ -393,7 +393,7 @@
                 style="?android:attr/listSeparatorTextViewStyle"
                 android:layout_marginTop="8dip"
                 android:text="@string/permissions_label" />
-            <TextView
+            <TextView android:id="@+id/security_settings_desc"
                 android:text="@string/security_settings_desc"
                 android:textAppearance="?android:attr/textAppearanceSmall"
                 android:paddingTop="6dip"
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 80a241517c3..00ed06b94a9 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -2495,6 +2495,28 @@
     <string name="security_settings_desc" product="tablet">This app can access the following on your tablet:</string>
     <!-- Manage applications, individual application info screen, text that appears under the "Permissions" heading. This describes the permissions that the application has. -->
     <string name="security_settings_desc" product="default">This app can access the following on your phone:</string>
+    <!-- [CHAR_LIMIT=NONE] Manage applications, individual application info screen, text that appears under the "Permissions" heading.
+         This describes the permissions that the application has.  It is used when multiple packages are contributing
+         to the permissions and need to be listed here. -->
+    <string name="security_settings_desc_multi" product="tablet">This app can access the following on your tablet.
+         In order to improve performance and reduce memory usage, some of these permissions
+         are available to <xliff:g id="base_app_name">%1$s</xliff:g>
+         because it runs in the same process as <xliff:g id="additional_apps_list">%2$s</xliff:g>:</string>
+    <!-- [CHAR_LIMIT=NONE] Manage applications, individual application info screen, text that appears under the "Permissions" heading.
+         This describes the permissions that the application has.  It is used when multiple packages are contributing
+         to the permissions and need to be listed here. -->
+    <string name="security_settings_desc_multi" product="default">This app can access the following on your phone.
+         In order to improve performance and reduce memory usage, some of these permissions
+         are available to <xliff:g id="base_app_name">%1$s</xliff:g>
+         because it runs in the same process as <xliff:g id="additional_apps_list">%2$s</xliff:g>:</string>
+    <!-- [CHAR_LIMIT=NONE] Format to put together two items in a list. -->
+    <string name="join_two_items"><xliff:g id="first_item">%1$s</xliff:g> and <xliff:g id="second_item">%2$s</xliff:g></string>
+    <!-- [CHAR_LIMIT=NONE] Format to put the last item at the end of a series of 3 or more items in a list -->
+    <string name="join_many_items_last"><xliff:g id="all_but_last_item">%1$s</xliff:g> and <xliff:g id="last_item">%2$s</xliff:g></string>
+    <!-- [CHAR_LIMIT=NONE] Format to put the first item at the start of a series of 3 or more items in a list -->
+    <string name="join_many_items_first"><xliff:g id="first_item">%1$s</xliff:g>, <xliff:g id="all_but_first_and_last_item">%2$s</xliff:g></string>
+    <!-- [CHAR_LIMIT=NONE] Format to put the middle items together in a series of 4 or more items in a list -->
+    <string name="join_many_items_middle"><xliff:g id="added_item">%1$s</xliff:g>, <xliff:g id="rest_of_items">%2$s</xliff:g></string>
     <string name="computing_size">Computing\u2026</string>
     <string name="invalid_size_value">Couldn\'t compute package size.</string>
     <!-- String displayed when list is empty -->
diff --git a/src/com/android/settings/applications/InstalledAppDetails.java b/src/com/android/settings/applications/InstalledAppDetails.java
index c2e358c2a7a..9166b15e222 100644
--- a/src/com/android/settings/applications/InstalledAppDetails.java
+++ b/src/com/android/settings/applications/InstalledAppDetails.java
@@ -27,7 +27,6 @@ import android.app.Dialog;
 import android.app.DialogFragment;
 import android.app.Fragment;
 import android.app.INotificationManager;
-import android.app.NotificationManager;
 import android.app.admin.DevicePolicyManager;
 import android.appwidget.AppWidgetManager;
 import android.content.BroadcastReceiver;
@@ -43,6 +42,7 @@ import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.res.Resources;
 import android.hardware.usb.IUsbManager;
 import android.net.Uri;
 import android.os.AsyncTask;
@@ -72,7 +72,6 @@ import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
-import android.widget.Switch;
 import android.widget.TextView;
 
 /**
@@ -595,6 +594,46 @@ public class InstalledAppDetails extends Fragment
                     R.id.security_settings_list);
             securityList.removeAllViews();
             securityList.addView(asp.getPermissionsView());
+            // If this app is running under a shared user ID with other apps,
+            // update the description to explain this.
+            String[] packages = mPm.getPackagesForUid(mPackageInfo.applicationInfo.uid);
+            if (packages != null && packages.length > 1) {
+                ArrayList<CharSequence> pnames = new ArrayList<CharSequence>();
+                for (int i=0; i<packages.length; i++) {
+                    String pkg = packages[i];
+                    if (mPackageInfo.packageName.equals(pkg)) {
+                        continue;
+                    }
+                    try {
+                        ApplicationInfo ainfo = mPm.getApplicationInfo(pkg, 0);
+                        pnames.add(ainfo.loadLabel(mPm));
+                    } catch (PackageManager.NameNotFoundException e) {
+                    }
+                }
+                final int N = pnames.size();
+                if (N > 0) {
+                    final Resources res = getActivity().getResources();
+                    String appListStr;
+                    if (N == 1) {
+                        appListStr = pnames.get(0).toString();
+                    } else if (N == 2) {
+                        appListStr = res.getString(R.string.join_two_items, pnames.get(0),
+                                pnames.get(1));
+                    } else {
+                        appListStr = pnames.get(N-2).toString();
+                        for (int i=N-3; i>=0; i--) {
+                            appListStr = res.getString(i == 0 ? R.string.join_many_items_first
+                                    : R.string.join_many_items_middle, pnames.get(i), appListStr);
+                        }
+                        appListStr = res.getString(R.string.join_many_items_last,
+                                appListStr, pnames.get(N-1));
+                    }
+                    TextView descr = (TextView) mRootView.findViewById(
+                            R.id.security_settings_desc);
+                    descr.setText(res.getString(R.string.security_settings_desc_multi,
+                            mPackageInfo.applicationInfo.loadLabel(mPm), appListStr));
+                }
+            }
         } else {
             permsView.setVisibility(View.GONE);
         }