diff --git a/source/java/org/alfresco/repo/rendition/AllRenditionTests.java b/source/java/org/alfresco/repo/rendition/AllRenditionTests.java
index b2d3400fe6..2940940ef2 100644
--- a/source/java/org/alfresco/repo/rendition/AllRenditionTests.java
+++ b/source/java/org/alfresco/repo/rendition/AllRenditionTests.java
@@ -42,7 +42,8 @@ import org.junit.runners.Suite;
         RenditionServiceIntegrationTest.class,
         RenditionServicePermissionsTest.class,
         RenditionNodeManagerTest.class,
-        HTMLRenderingEngineTest.class
+        HTMLRenderingEngineTest.class,
+        MultiUserRenditionTest.class
 })
 public class AllRenditionTests
 {
diff --git a/source/java/org/alfresco/repo/rendition/MultiUserRenditionTest.java b/source/java/org/alfresco/repo/rendition/MultiUserRenditionTest.java
new file mode 100644
index 0000000000..848646c9f2
--- /dev/null
+++ b/source/java/org/alfresco/repo/rendition/MultiUserRenditionTest.java
@@ -0,0 +1,269 @@
+/*
+ * Copyright (C) 2005-2010 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.alfresco.repo.rendition;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+import java.io.File;
+import java.io.Serializable;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.alfresco.model.ContentModel;
+import org.alfresco.repo.content.MimetypeMap;
+import org.alfresco.repo.content.transform.AbstractContentTransformerTest;
+import org.alfresco.repo.model.Repository;
+import org.alfresco.repo.security.authentication.AuthenticationUtil;
+import org.alfresco.repo.transaction.RetryingTransactionHelper;
+import org.alfresco.service.cmr.rendition.RenditionDefinition;
+import org.alfresco.service.cmr.rendition.RenditionService;
+import org.alfresco.service.cmr.repository.ContentService;
+import org.alfresco.service.cmr.repository.ContentWriter;
+import org.alfresco.service.cmr.repository.NodeRef;
+import org.alfresco.service.cmr.repository.NodeService;
+import org.alfresco.service.cmr.security.MutableAuthenticationService;
+import org.alfresco.service.cmr.security.PermissionService;
+import org.alfresco.service.cmr.security.PersonService;
+import org.alfresco.service.namespace.NamespaceService;
+import org.alfresco.service.namespace.QName;
+import org.alfresco.service.transaction.TransactionService;
+import org.alfresco.util.ApplicationContextHelper;
+import org.alfresco.util.PropertyMap;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.springframework.context.ApplicationContext;
+
+/**
+ * This test class tests the use of the {@link RenditionService} by multiple users.
+ * 
+ * @author Neil McErlean
+ * @since 3.3.4
+ */
+public class MultiUserRenditionTest
+{
+    private static ApplicationContext appContext;
+
+    private static String ADMIN_USER;
+    private static final String NON_ADMIN_USER = "nonAdmin";
+    
+    private static MutableAuthenticationService authenticationService;
+    private static ContentService contentService;
+    private static NodeService nodeService;
+    private static PermissionService permissionService;
+    private static PersonService personService;
+    private static RenditionService renditionService;
+    private static Repository repositoryHelper;
+    private static RetryingTransactionHelper txnHelper;
+    private static TransactionService transactionService;
+    
+    private List<NodeRef> nodesToBeTidiedUp = new ArrayList<NodeRef>();
+    private NodeRef testFolder;
+
+    @BeforeClass
+    public static void initContextAndCreateUser()
+    {
+        appContext = ApplicationContextHelper.getApplicationContext();
+
+        authenticationService = (MutableAuthenticationService) appContext.getBean("AuthenticationService");
+        contentService = (ContentService) appContext.getBean("ContentService");
+        nodeService = (NodeService) appContext.getBean("NodeService");
+        permissionService = (PermissionService) appContext.getBean("PermissionService");
+        personService = (PersonService) appContext.getBean("PersonService");
+        renditionService = (RenditionService) appContext.getBean("RenditionService");
+        repositoryHelper = (Repository) appContext.getBean("repositoryHelper");
+        transactionService = (TransactionService) appContext.getBean("TransactionService");
+        txnHelper = transactionService.getRetryingTransactionHelper();
+
+        ADMIN_USER = AuthenticationUtil.getAdminUserName();
+        
+        // Create a nonAdminUser
+        createUser(NON_ADMIN_USER);
+
+    }
+
+    public static void createUser(String userName)
+    {
+        AuthenticationUtil.setFullyAuthenticatedUser(ADMIN_USER);
+
+        if (!authenticationService.authenticationExists(userName))
+        {
+            authenticationService.createAuthentication(userName, userName.toCharArray());
+        }
+        
+        if (!personService.personExists(userName))
+        {
+            PropertyMap ppOne = new PropertyMap();
+            ppOne.put(ContentModel.PROP_USERNAME, userName);
+            ppOne.put(ContentModel.PROP_FIRSTNAME, "firstName");
+            ppOne.put(ContentModel.PROP_LASTNAME, "lastName");
+            ppOne.put(ContentModel.PROP_EMAIL, "email@email.com");
+            ppOne.put(ContentModel.PROP_JOBTITLE, "jobTitle");
+            
+            personService.createPerson(ppOne);
+        }
+    }
+
+    @Before public void createTestFolder()
+    {
+        AuthenticationUtil.setFullyAuthenticatedUser(ADMIN_USER);
+        final NodeRef companyHome = repositoryHelper.getCompanyHome();
+        
+        Map<QName, Serializable> props = new HashMap<QName, Serializable>();
+        props.put(ContentModel.PROP_NAME, this.getClass() + "_testFolder");
+        testFolder = nodeService.createNode(companyHome, 
+                                                ContentModel.ASSOC_CONTAINS, 
+                                                ContentModel.ASSOC_CONTAINS, 
+                                                ContentModel.TYPE_FOLDER,
+                                                props).getChildRef();
+        // Let anyone (meaning non-admin) do anything (meaning create new content)
+        permissionService.setPermission(testFolder, PermissionService.ALL_AUTHORITIES, PermissionService.ALL_PERMISSIONS, true);
+        this.nodesToBeTidiedUp.add(testFolder);
+    }
+
+    /**
+     * This test method ensures that users who cause renditions (thumbnails) to
+     * be created on nodes are not made the modifier of the source node.
+     */
+    @Test
+    public void renditioningShouldNotChangeModifierOnSourceNode_ALF3991()
+    {
+        // Create a doc as admin
+        AuthenticationUtil.setFullyAuthenticatedUser(ADMIN_USER);
+        
+        final NodeRef adminPdfNode = txnHelper.doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<NodeRef>()
+                {
+                    public NodeRef execute() throws Throwable
+                    {
+                        return createPdfDocumentAsCurrentlyAuthenticatedUser(ADMIN_USER + "_content");
+                    }
+                });
+        this.nodesToBeTidiedUp.add(adminPdfNode);
+
+        
+        // Create another doc as non-admin
+        AuthenticationUtil.setFullyAuthenticatedUser(NON_ADMIN_USER);
+        
+        final NodeRef nonAdminPdfNode = txnHelper.doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<NodeRef>()
+                {
+                    public NodeRef execute() throws Throwable
+                    {
+                        return createPdfDocumentAsCurrentlyAuthenticatedUser(NON_ADMIN_USER + "_content");
+                    }
+                });
+        this.nodesToBeTidiedUp.add(nonAdminPdfNode);
+        
+        // Now have each user create a rendition (thumbnail) of the other user's content node.
+        final RenditionDefinition doclibRD = renditionService.loadRenditionDefinition(QName.createQName(NamespaceService.CONTENT_MODEL_1_0_URI, "doclib"));
+        
+        AuthenticationUtil.setFullyAuthenticatedUser(ADMIN_USER);
+        txnHelper.doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<Void>()
+                {
+                    public Void execute() throws Throwable
+                    {
+                        renditionService.render(nonAdminPdfNode, doclibRD);
+                        return null;
+                    }
+                });
+
+        AuthenticationUtil.setFullyAuthenticatedUser(NON_ADMIN_USER);
+        txnHelper.doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<Void>()
+                {
+                    public Void execute() throws Throwable
+                    {
+                        renditionService.render(adminPdfNode, doclibRD);
+                        return null;
+                    }
+                });
+        
+        // And now check that the two source nodes still have the correct modifier property.
+        // This will ensure that the auditable properties behaviour has been correctly filtered.
+        txnHelper.doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<Void>()
+                {
+                    public Void execute() throws Throwable
+                    {
+                        assertEquals("Incorrect modifier property", ADMIN_USER, nodeService.getProperty(adminPdfNode, ContentModel.PROP_MODIFIER));
+                        assertEquals("Incorrect modifier property", NON_ADMIN_USER, nodeService.getProperty(nonAdminPdfNode, ContentModel.PROP_MODIFIER));
+                        return null;
+                    }
+                });
+    }
+    
+    @After public void tidyUpUnwantedNodeRefs()
+    {
+        AuthenticationUtil.setFullyAuthenticatedUser(ADMIN_USER);
+        
+        txnHelper.doInTransaction(new RetryingTransactionHelper.RetryingTransactionCallback<Void>()
+                {
+                    public Void execute() throws Throwable
+                    {
+                        for (NodeRef node : nodesToBeTidiedUp)
+                        {
+                            if (nodeService.exists(node))
+                                nodeService.deleteNode(node);
+                        }
+                        return null;
+                    }
+                });  
+        nodesToBeTidiedUp.clear();
+    }
+    
+    private NodeRef createPdfDocumentAsCurrentlyAuthenticatedUser(final String nodeName)
+    {
+        Map<QName, Serializable> props = new HashMap<QName, Serializable>();
+        props.put(ContentModel.PROP_NAME, nodeName);
+        NodeRef result = nodeService.createNode(testFolder, 
+                                                ContentModel.ASSOC_CONTAINS, 
+                                                QName.createQName(NamespaceService.CONTENT_MODEL_1_0_URI, nodeName), 
+                                                ContentModel.TYPE_CONTENT,
+                                                props).getChildRef();
+        
+        File file = loadQuickPdfFile();
+
+        // Set the content
+        ContentWriter writer = contentService.getWriter(result, ContentModel.PROP_CONTENT, true);
+        writer.setMimetype(MimetypeMap.MIMETYPE_PDF);
+        writer.setEncoding("UTF-8");
+        
+        writer.putContent(file);
+        
+        return result;
+    }
+
+    private File loadQuickPdfFile()
+    {
+        URL url = AbstractContentTransformerTest.class.getClassLoader().getResource("quick/quick.pdf");
+        if (url == null)
+        {
+            fail("Could not load pdf file");
+        }
+        File file = new File(url.getFile());
+        if (!file.exists())
+        {
+            fail("Could not load pdf file");
+        }
+        return file;
+    }          
+}
\ No newline at end of file