diff --git a/livesupport/src/modules/authentication/include/LiveSupport/Authentication/AuthenticationClientInterface.h b/livesupport/src/modules/authentication/include/LiveSupport/Authentication/AuthenticationClientInterface.h
index 48306f4fe..b4d2b4d5d 100644
--- a/livesupport/src/modules/authentication/include/LiveSupport/Authentication/AuthenticationClientInterface.h
+++ b/livesupport/src/modules/authentication/include/LiveSupport/Authentication/AuthenticationClientInterface.h
@@ -203,6 +203,18 @@ class AuthenticationClientInterface
                                                 throw (XmlRpcException)
                                                                         = 0;
 
+        /**
+         *  Reset the authentication client.
+         *  Invalidates all active session IDs, and resets the list of 
+         *  preferences to its initial (empty) state.
+         *
+         *  @exception XmlRpcException if the server returns an error.
+         */
+        virtual void
+        reset(void)
+                                                throw (XmlRpcException)
+                                                                        = 0;
+
         /**
          *  A virtual destructor, as this class has virtual functions.
          */
diff --git a/livesupport/src/modules/authentication/src/AuthenticationClientFactoryTest.cxx b/livesupport/src/modules/authentication/src/AuthenticationClientFactoryTest.cxx
index 067fd27a4..36ac29ccc 100644
--- a/livesupport/src/modules/authentication/src/AuthenticationClientFactoryTest.cxx
+++ b/livesupport/src/modules/authentication/src/AuthenticationClientFactoryTest.cxx
@@ -113,6 +113,10 @@ AuthenticationClientFactoryTest :: firstTest(void)
                             acf = AuthenticationClientFactory::getInstance();
     Ptr<AuthenticationClientInterface>::Ref
                             authentication = acf->getAuthenticationClient();
+    
+    CPPUNIT_ASSERT_NO_THROW(
+        authentication->reset()
+    );
 
     Ptr<SessionId>::Ref     sessionId;
     
@@ -143,6 +147,10 @@ AuthenticationClientFactoryTest :: preferencesTest(void)
                             acf = AuthenticationClientFactory::getInstance();
     Ptr<AuthenticationClientInterface>::Ref
                             authentication = acf->getAuthenticationClient();
+    
+    CPPUNIT_ASSERT_NO_THROW(
+        authentication->reset()
+    );
 
     Ptr<SessionId>::Ref             sessionId;
     Ptr<const Glib::ustring>::Ref   prefValue;
diff --git a/livesupport/src/modules/authentication/src/TestAuthenticationClient.cxx b/livesupport/src/modules/authentication/src/TestAuthenticationClient.cxx
index b81b78dd2..e96498465 100644
--- a/livesupport/src/modules/authentication/src/TestAuthenticationClient.cxx
+++ b/livesupport/src/modules/authentication/src/TestAuthenticationClient.cxx
@@ -280,3 +280,17 @@ TestAuthenticationClient :: deletePreferencesItem(
     preferences.erase(it);
 }
 
+
+/*------------------------------------------------------------------------------
+ *  Reset the list of preferences to its initial (empty) state.
+ *----------------------------------------------------------------------------*/
+void
+TestAuthenticationClient :: reset(void)
+                                                throw (XmlRpcException)
+{
+    sessionIdList.clear();
+    sessionCounter = 0;
+    
+    preferences.clear();
+}
+
diff --git a/livesupport/src/modules/authentication/src/TestAuthenticationClient.h b/livesupport/src/modules/authentication/src/TestAuthenticationClient.h
index 239761e78..375789a9a 100644
--- a/livesupport/src/modules/authentication/src/TestAuthenticationClient.h
+++ b/livesupport/src/modules/authentication/src/TestAuthenticationClient.h
@@ -261,6 +261,17 @@ class TestAuthenticationClient :
         deletePreferencesItem(Ptr<SessionId>::Ref           sessionId,
                               const Glib::ustring &         key)
                                                 throw (XmlRpcException);
+
+        /**
+         *  Reset the authentication client.
+         *  Invalidates all active session IDs, and resets the list of 
+         *  preferences to its initial (empty) state.
+         *
+         *  @exception XmlRpcException if the server returns an error.
+         */
+        virtual void
+        reset(void)
+                                                throw (XmlRpcException);
 };
 
 
diff --git a/livesupport/src/modules/authentication/src/WebAuthenticationClient.h b/livesupport/src/modules/authentication/src/WebAuthenticationClient.h
index f2f23d97a..2c5439239 100644
--- a/livesupport/src/modules/authentication/src/WebAuthenticationClient.h
+++ b/livesupport/src/modules/authentication/src/WebAuthenticationClient.h
@@ -272,11 +272,13 @@ class WebAuthenticationClient :
                                                 throw (XmlRpcException);
 
         /**
-         *  Reset the list of preferences to its initial (empty) state.
+         *  Reset the authentication client.
+         *  Invalidates all active session IDs, and resets the list of 
+         *  preferences to its initial (empty) state.
          *
          *  @exception XmlRpcException if the server returns an error.
          */
-        void
+        virtual void
         reset(void)
                                                 throw (XmlRpcException);
 };