diff --git a/src/Orchard.Core.Tests/Body/BodyPartTests.cs b/src/Orchard.Core.Tests/Body/BodyPartTests.cs
index 6007265ea..a04c75be8 100644
--- a/src/Orchard.Core.Tests/Body/BodyPartTests.cs
+++ b/src/Orchard.Core.Tests/Body/BodyPartTests.cs
@@ -32,6 +32,7 @@ namespace Orchard.Core.Tests.Body {
         public override void Register(ContainerBuilder builder) {
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
             builder.RegisterInstance(new Mock<ITransactionManager>().Object);
diff --git a/src/Orchard.Core.Tests/Common/Providers/CommonPartProviderTests.cs b/src/Orchard.Core.Tests/Common/Providers/CommonPartProviderTests.cs
index 5b8028c3a..75d6b0f6c 100644
--- a/src/Orchard.Core.Tests/Common/Providers/CommonPartProviderTests.cs
+++ b/src/Orchard.Core.Tests/Common/Providers/CommonPartProviderTests.cs
@@ -51,6 +51,7 @@ namespace Orchard.Core.Tests.Common.Providers {
 
         public override void Register(ContainerBuilder builder) {
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterType<TestHandler>().As<IContentHandler>();
             builder.RegisterType<CommonPartHandler>().As<IContentHandler>();
diff --git a/src/Orchard.Core.Tests/Scheduling/ScheduledTaskExecutorTests.cs b/src/Orchard.Core.Tests/Scheduling/ScheduledTaskExecutorTests.cs
index 887c08409..00a7566a8 100644
--- a/src/Orchard.Core.Tests/Scheduling/ScheduledTaskExecutorTests.cs
+++ b/src/Orchard.Core.Tests/Scheduling/ScheduledTaskExecutorTests.cs
@@ -38,6 +38,7 @@ namespace Orchard.Core.Tests.Scheduling {
             builder.RegisterInstance(new Mock<ITransactionManager>().Object);
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterType<DefaultShapeTableManager>().As<IShapeTableManager>();
             builder.RegisterType<ShapeTableLocator>().As<IShapeTableLocator>();
diff --git a/src/Orchard.Core.Tests/Scheduling/ScheduledTaskManagerTests.cs b/src/Orchard.Core.Tests/Scheduling/ScheduledTaskManagerTests.cs
index a6422e375..10daf173c 100644
--- a/src/Orchard.Core.Tests/Scheduling/ScheduledTaskManagerTests.cs
+++ b/src/Orchard.Core.Tests/Scheduling/ScheduledTaskManagerTests.cs
@@ -40,6 +40,7 @@ namespace Orchard.Core.Tests.Scheduling {
         public override void Register(ContainerBuilder builder) {
             builder.RegisterInstance(_mockServices.Object);
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterType<DefaultShapeTableManager>().As<IShapeTableManager>();
diff --git a/src/Orchard.Tests.Modules/Comments/Services/CommentServiceTests.cs b/src/Orchard.Tests.Modules/Comments/Services/CommentServiceTests.cs
index a1e0c3c05..491edf9ae 100644
--- a/src/Orchard.Tests.Modules/Comments/Services/CommentServiceTests.cs
+++ b/src/Orchard.Tests.Modules/Comments/Services/CommentServiceTests.cs
@@ -39,6 +39,7 @@ namespace Orchard.Tests.Modules.Comments.Services {
             builder.RegisterType<CommentService>().As<ICommentService>();
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
             builder.RegisterInstance(new Mock<ITransactionManager>().Object);
diff --git a/src/Orchard.Tests.Modules/Indexing/IndexingTaskExecutorTests.cs b/src/Orchard.Tests.Modules/Indexing/IndexingTaskExecutorTests.cs
index d7196ae7f..48690f1c0 100644
--- a/src/Orchard.Tests.Modules/Indexing/IndexingTaskExecutorTests.cs
+++ b/src/Orchard.Tests.Modules/Indexing/IndexingTaskExecutorTests.cs
@@ -67,6 +67,7 @@ namespace Orchard.Tests.Modules.Indexing {
             builder.RegisterType<IndexingTaskManager>().As<IIndexingTaskManager>();
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(_contentDefinitionManager.Object);
             builder.RegisterInstance(new Mock<IContentDisplay>().Object);
diff --git a/src/Orchard.Tests.Modules/Tags/Services/TagsServiceTests.cs b/src/Orchard.Tests.Modules/Tags/Services/TagsServiceTests.cs
index 05e99dc04..d7ca25c5c 100644
--- a/src/Orchard.Tests.Modules/Tags/Services/TagsServiceTests.cs
+++ b/src/Orchard.Tests.Modules/Tags/Services/TagsServiceTests.cs
@@ -39,6 +39,7 @@ namespace Orchard.Tests.Modules.Tags.Services {
             builder.RegisterType<OrchardServices>().As<IOrchardServices>();
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterGeneric(typeof(Repository<>)).As(typeof(IRepository<>));
         }
 
diff --git a/src/Orchard.Tests.Modules/Users/Services/MembershipServiceTests.cs b/src/Orchard.Tests.Modules/Users/Services/MembershipServiceTests.cs
index d2392ed20..96dc3062e 100644
--- a/src/Orchard.Tests.Modules/Users/Services/MembershipServiceTests.cs
+++ b/src/Orchard.Tests.Modules/Users/Services/MembershipServiceTests.cs
@@ -74,6 +74,7 @@ namespace Orchard.Tests.Modules.Users.Services {
             builder.RegisterType<DefaultContentQuery>().As<IContentQuery>();
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType(typeof(SettingsFormatter)).As<ISettingsFormatter>();
             builder.RegisterType<ContentDefinitionManager>().As<IContentDefinitionManager>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
diff --git a/src/Orchard.Tests.Modules/Users/Services/UserServiceTests.cs b/src/Orchard.Tests.Modules/Users/Services/UserServiceTests.cs
index a22de7868..4192d6bad 100644
--- a/src/Orchard.Tests.Modules/Users/Services/UserServiceTests.cs
+++ b/src/Orchard.Tests.Modules/Users/Services/UserServiceTests.cs
@@ -85,6 +85,7 @@ namespace Orchard.Tests.Modules.Users.Services {
             builder.RegisterType<DefaultContentQuery>().As<IContentQuery>();
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType(typeof(SettingsFormatter)).As<ISettingsFormatter>();
             builder.RegisterType<ContentDefinitionManager>().As<IContentDefinitionManager>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
diff --git a/src/Orchard.Tests.Modules/Widgets/Services/WidgetsServiceTest.cs b/src/Orchard.Tests.Modules/Widgets/Services/WidgetsServiceTest.cs
index 04c94df17..7ccc08bae 100644
--- a/src/Orchard.Tests.Modules/Widgets/Services/WidgetsServiceTest.cs
+++ b/src/Orchard.Tests.Modules/Widgets/Services/WidgetsServiceTest.cs
@@ -90,6 +90,7 @@ namespace Orchard.Tests.Modules.Widgets.Services {
 
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
             builder.RegisterInstance(new Mock<ITransactionManager>().Object);
diff --git a/src/Orchard.Tests/ContentManagement/ContentQueryTests.cs b/src/Orchard.Tests/ContentManagement/ContentQueryTests.cs
index 34fef1583..3e9d3ea52 100644
--- a/src/Orchard.Tests/ContentManagement/ContentQueryTests.cs
+++ b/src/Orchard.Tests/ContentManagement/ContentQueryTests.cs
@@ -48,6 +48,7 @@ namespace Orchard.Tests.ContentManagement {
 
             builder.RegisterModule(new ContentModule());
             builder.RegisterType<DefaultContentManager>().As<IContentManager>().SingleInstance();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
diff --git a/src/Orchard.Tests/ContentManagement/DefaultContentManagerTests.cs b/src/Orchard.Tests/ContentManagement/DefaultContentManagerTests.cs
index 2b3927b58..dad21d5f5 100644
--- a/src/Orchard.Tests/ContentManagement/DefaultContentManagerTests.cs
+++ b/src/Orchard.Tests/ContentManagement/DefaultContentManagerTests.cs
@@ -61,6 +61,7 @@ namespace Orchard.Tests.ContentManagement {
             builder.RegisterType<DefaultContentQuery>().As<IContentQuery>();
             builder.RegisterType<DefaultContentManager>().As<IContentManager>();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(_contentDefinitionManager.Object);
             builder.RegisterInstance(new Mock<IContentDisplay>().Object);
diff --git a/src/Orchard.Tests/ContentManagement/DynamicContentQueryTests.cs b/src/Orchard.Tests/ContentManagement/DynamicContentQueryTests.cs
index b042ff3d9..274c16317 100644
--- a/src/Orchard.Tests/ContentManagement/DynamicContentQueryTests.cs
+++ b/src/Orchard.Tests/ContentManagement/DynamicContentQueryTests.cs
@@ -47,6 +47,7 @@ namespace Orchard.Tests.ContentManagement {
             builder.RegisterModule(new ContentModule());
             builder.RegisterType<DefaultContentManager>().As<IContentManager>().SingleInstance();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
             builder.RegisterInstance(new Mock<IContentDisplay>().Object);
diff --git a/src/Orchard.Tests/ContentManagement/HqlExpressionTests.cs b/src/Orchard.Tests/ContentManagement/HqlExpressionTests.cs
index 403b0f4e8..94f9f6fb7 100644
--- a/src/Orchard.Tests/ContentManagement/HqlExpressionTests.cs
+++ b/src/Orchard.Tests/ContentManagement/HqlExpressionTests.cs
@@ -50,6 +50,7 @@ namespace Orchard.Tests.ContentManagement {
             builder.RegisterModule(new ContentModule());
             builder.RegisterType<DefaultContentManager>().As<IContentManager>().SingleInstance();
             builder.RegisterType<StubCacheManager>().As<ICacheManager>();
+            builder.RegisterType<Signals>().As<ISignals>();
             builder.RegisterType<DefaultContentManagerSession>().As<IContentManagerSession>();
             builder.RegisterInstance(new Mock<IContentDefinitionManager>().Object);
             builder.RegisterInstance(new Mock<IContentDisplay>().Object);
diff --git a/src/Orchard.Web/Modules/Orchard.MediaProcessing/Views/Admin/Index.cshtml b/src/Orchard.Web/Modules/Orchard.MediaProcessing/Views/Admin/Index.cshtml
index 289a939cb..f93106174 100644
--- a/src/Orchard.Web/Modules/Orchard.MediaProcessing/Views/Admin/Index.cshtml
+++ b/src/Orchard.Web/Modules/Orchard.MediaProcessing/Views/Admin/Index.cshtml
@@ -56,7 +56,7 @@
                     <td>
                         @Html.ActionLink(T("Properties").ToString(), "Edit", new { Area = "Contents", id = entry.ImageProfileId, returnurl = HttpContext.Current.Request.RawUrl }) |
                         @Html.ActionLink(T("Edit").ToString(), "Edit", new { id = entry.ImageProfileId }) |
-                        @Html.ActionLink(T("Delete").ToString(), "Delete", new { id = entry.ImageProfileId }, new { itemprop = "RemoveUrl UnsafeUrl" }) |
+                        @Html.ActionLink(T("Delete").ToString(), "Delete", new { id = entry.ImageProfileId }, new { itemprop = "RemoveUrl UnsafeUrl" })
                         @*@Html.ActionLink(T("Preview").ToString(), "Preview", new { id = entry.ImageProfileId })*@
                     </td>
                 </tr>
diff --git a/src/Orchard/ContentManagement/DefaultContentManager.cs b/src/Orchard/ContentManagement/DefaultContentManager.cs
index c7881582a..869385462 100644
--- a/src/Orchard/ContentManagement/DefaultContentManager.cs
+++ b/src/Orchard/ContentManagement/DefaultContentManager.cs
@@ -34,6 +34,7 @@ namespace Orchard.ContentManagement {
         private readonly Lazy<ISessionLocator> _sessionLocator; 
         private readonly Lazy<IEnumerable<IContentHandler>> _handlers;
         private readonly Lazy<IEnumerable<IIdentityResolverSelector>> _identityResolverSelectors;
+        private readonly ISignals _signals;
 
         private const string Published = "Published";
         private const string Draft = "Draft";
@@ -49,7 +50,8 @@ namespace Orchard.ContentManagement {
             Lazy<IContentDisplay> contentDisplay,
             Lazy<ISessionLocator> sessionLocator,
             Lazy<IEnumerable<IContentHandler>> handlers,
-            Lazy<IEnumerable<IIdentityResolverSelector>> identityResolverSelectors) {
+            Lazy<IEnumerable<IIdentityResolverSelector>> identityResolverSelectors,
+            ISignals signals) {
             _context = context;
             _contentTypeRepository = contentTypeRepository;
             _contentItemRepository = contentItemRepository;
@@ -58,6 +60,7 @@ namespace Orchard.ContentManagement {
             _cacheManager = cacheManager;
             _contentManagerSession = contentManagerSession;
             _identityResolverSelectors = identityResolverSelectors;
+            _signals = signals;
             _handlers = handlers;
             _contentDisplay = contentDisplay;
             _sessionLocator = sessionLocator;
@@ -720,6 +723,8 @@ namespace Orchard.ContentManagement {
 
         private ContentTypeRecord AcquireContentTypeRecord(string contentType) {
             var contentTypeId = _cacheManager.Get(contentType + "_Record", ctx => {
+                ctx.Monitor(_signals.When(contentType + "_Record"));
+
                 var contentTypeRecord = _contentTypeRepository.Get(x => x.Name == contentType);
 
                 if (contentTypeRecord == null) {
@@ -731,7 +736,20 @@ namespace Orchard.ContentManagement {
                 return contentTypeRecord.Id;
             });
 
-            return _contentTypeRepository.Get(contentTypeId);
+            // There is a case when a content type record is created locally but the transaction is actually
+            // cancelled. In this case we are caching an Id which is none existent, or might represent another
+            // content type. Thus we need to ensure that the cache is valid, or invalidate it and retrieve it 
+            // another time.
+            
+            var result = _contentTypeRepository.Get(contentTypeId);
+
+            if (result != null && result.Name.Equals(contentType, StringComparison.OrdinalIgnoreCase) ) {
+                return result;
+            }
+
+            // invalidate the cache entry and load it again
+            _signals.Trigger(contentType + "_Record");
+            return AcquireContentTypeRecord(contentType);
         }
 
         public void Index(ContentItem contentItem, IDocumentIndex documentIndex) {