diff --git a/MediaBrowser.Controller/Dto/DtoBuilder.cs b/MediaBrowser.Controller/Dto/DtoBuilder.cs
index 078b3c664c..6f9836448c 100644
--- a/MediaBrowser.Controller/Dto/DtoBuilder.cs
+++ b/MediaBrowser.Controller/Dto/DtoBuilder.cs
@@ -277,12 +277,16 @@ namespace MediaBrowser.Controller.Dto
 
             if (item.IsFolder)
             {
-                if (fields.Contains(ItemFields.ItemCounts))
+                var hasItemCounts = fields.Contains(ItemFields.ItemCounts);
+
+                if (hasItemCounts || fields.Contains(ItemFields.CumulativeRunTimeTicks))
                 {
                     var folder = (Folder)item;
 
-                    // Skip sorting since all we want is a count
-                    dto.ChildCount = folder.GetChildren(user, true).Count();
+                    if (hasItemCounts)
+                    {
+                        dto.ChildCount = folder.GetChildren(user, true).Count();
+                    }
 
                     SetSpecialCounts(folder, user, dto, _userDataRepository);
                 }
@@ -749,6 +753,7 @@ namespace MediaBrowser.Controller.Dto
             var rcentlyAddedItemCount = 0;
             var recursiveItemCount = 0;
             var unplayed = 0;
+            long runtime = 0;
 
             double totalPercentPlayed = 0;
 
@@ -788,6 +793,8 @@ namespace MediaBrowser.Controller.Dto
                 {
                     unplayed++;
                 }
+
+                runtime += child.RunTimeTicks ?? 0;
             }
 
             dto.RecursiveItemCount = recursiveItemCount;
@@ -798,6 +805,11 @@ namespace MediaBrowser.Controller.Dto
             {
                 dto.PlayedPercentage = totalPercentPlayed / recursiveItemCount;
             }
+
+            if (runtime > 0)
+            {
+                dto.CumulativeRunTimeTicks = runtime;
+            }
         }
 
         /// <summary>
@@ -833,7 +845,9 @@ namespace MediaBrowser.Controller.Dto
 
             )).ConfigureAwait(false);
 
-            var dictionary = entities.Where(i => i != null).ToDictionary(i => i.Name, StringComparer.OrdinalIgnoreCase);
+            var dictionary = entities.Where(i => i != null)
+                .Distinct()
+                .ToDictionary(i => i.Name, StringComparer.OrdinalIgnoreCase);
 
             for (var i = 0; i < people.Count; i++)
             {
diff --git a/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs b/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs
index d57c354f7d..9564bf5a8c 100644
--- a/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs
+++ b/MediaBrowser.Controller/Resolvers/EntityResolutionHelper.cs
@@ -24,6 +24,7 @@ namespace MediaBrowser.Controller.Resolvers
                 ".m2ts",
                 ".img",
                 ".iso",
+                ".mk3d",
                 ".ts",
                 ".rmvb",
                 ".mov",
diff --git a/MediaBrowser.Model/Dto/BaseItemDto.cs b/MediaBrowser.Model/Dto/BaseItemDto.cs
index d6217c1e78..1c0fbed07e 100644
--- a/MediaBrowser.Model/Dto/BaseItemDto.cs
+++ b/MediaBrowser.Model/Dto/BaseItemDto.cs
@@ -113,6 +113,12 @@ namespace MediaBrowser.Model.Dto
         /// </summary>
         /// <value>The original run time ticks.</value>
         public long? OriginalRunTimeTicks { get; set; }
+
+        /// <summary>
+        /// Gets or sets the cumulative run time ticks.
+        /// </summary>
+        /// <value>The cumulative run time ticks.</value>
+        public long? CumulativeRunTimeTicks { get; set; }
         
         /// <summary>
         /// Gets or sets the run time ticks.
diff --git a/MediaBrowser.Model/Querying/ItemFields.cs b/MediaBrowser.Model/Querying/ItemFields.cs
index 4e412d0ac3..b39325fe23 100644
--- a/MediaBrowser.Model/Querying/ItemFields.cs
+++ b/MediaBrowser.Model/Querying/ItemFields.cs
@@ -21,6 +21,11 @@ namespace MediaBrowser.Model.Querying
         /// </summary>
         CriticRatingSummary,
 
+        /// <summary>
+        /// The cumulative run time ticks
+        /// </summary>
+        CumulativeRunTimeTicks,
+
         /// <summary>
         /// The custom rating
         /// </summary>