diff --git a/source/org/jivesoftware/smack/PrivacyListManager.java b/source/org/jivesoftware/smack/PrivacyListManager.java
index 88d9aed83..32d039018 100644
--- a/source/org/jivesoftware/smack/PrivacyListManager.java
+++ b/source/org/jivesoftware/smack/PrivacyListManager.java
@@ -58,7 +58,7 @@ public class PrivacyListManager {
         // instance when the connection is closed.
         Connection.addConnectionCreationListener(new ConnectionCreationListener() {
             public void connectionCreated(Connection connection) {
-                new PrivacyListManager(connection);
+                getInstanceFor(connection);
             }
         });
     }
@@ -129,8 +129,10 @@ public class PrivacyListManager {
      * @param connection the connection used to look for the proper PrivacyListManager.
      * @return the PrivacyListManager associated with a given Connection.
      */
-    public static PrivacyListManager getInstanceFor(Connection connection) {
-        return instances.get(connection);
+    public static synchronized PrivacyListManager getInstanceFor(Connection connection) {
+        PrivacyListManager plm = instances.get(connection);
+        if (plm == null) plm = new PrivacyListManager(connection);
+        return plm;
     }
     
 	/**
diff --git a/source/org/jivesoftware/smack/keepalive/KeepAliveManager.java b/source/org/jivesoftware/smack/keepalive/KeepAliveManager.java
index a3cb4475f..254a0419b 100644
--- a/source/org/jivesoftware/smack/keepalive/KeepAliveManager.java
+++ b/source/org/jivesoftware/smack/keepalive/KeepAliveManager.java
@@ -59,7 +59,7 @@ public class KeepAliveManager {
         if (SmackConfiguration.getKeepAliveInterval() > 0) {
             Connection.addConnectionCreationListener(new ConnectionCreationListener() {
                 public void connectionCreated(Connection connection) {
-                    new KeepAliveManager(connection);
+                    getInstanceFor(connection);
                 }
             });
         }
diff --git a/source/org/jivesoftware/smackx/commands/AdHocCommandManager.java b/source/org/jivesoftware/smackx/commands/AdHocCommandManager.java
index 71698e311..28401d67d 100755
--- a/source/org/jivesoftware/smackx/commands/AdHocCommandManager.java
+++ b/source/org/jivesoftware/smackx/commands/AdHocCommandManager.java
@@ -83,7 +83,7 @@ public class AdHocCommandManager {
     static {
         Connection.addConnectionCreationListener(new ConnectionCreationListener() {
             public void connectionCreated(Connection connection) {
-                new AdHocCommandManager(connection);
+                getAddHocCommandsManager(connection);
             }
         });
     }
diff --git a/source/org/jivesoftware/smackx/ping/PingManager.java b/source/org/jivesoftware/smackx/ping/PingManager.java
index 6882545fd..068206698 100644
--- a/source/org/jivesoftware/smackx/ping/PingManager.java
+++ b/source/org/jivesoftware/smackx/ping/PingManager.java
@@ -60,7 +60,7 @@ public class PingManager {
     static {
         Connection.addConnectionCreationListener(new ConnectionCreationListener() {
             public void connectionCreated(Connection connection) {
-                new PingManager(connection);
+                getInstanceFor(connection);
             }
         });
     }
diff --git a/source/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java b/source/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java
index 125b87e63..0b4a6aae6 100644
--- a/source/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java
+++ b/source/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java
@@ -47,7 +47,7 @@ public class DeliveryReceiptManager implements PacketListener {
     static {
         Connection.addConnectionCreationListener(new ConnectionCreationListener() {
             public void connectionCreated(Connection connection) {
-                new DeliveryReceiptManager(connection);
+                getInstanceFor(connection);
             }
         });
     }
@@ -74,7 +74,7 @@ public class DeliveryReceiptManager implements PacketListener {
      *
      * @return the DeliveryReceiptManager instance for the given connection
      */
-    synchronized public static DeliveryReceiptManager getInstanceFor(Connection connection) {
+     public static synchronized DeliveryReceiptManager getInstanceFor(Connection connection) {
         DeliveryReceiptManager receiptManager = instances.get(connection);
 
         if (receiptManager == null) {