diff --git a/MediaBrowser.Api/ItemUpdateService.cs b/MediaBrowser.Api/ItemUpdateService.cs
index 0138380915..bab02de356 100644
--- a/MediaBrowser.Api/ItemUpdateService.cs
+++ b/MediaBrowser.Api/ItemUpdateService.cs
@@ -389,22 +389,28 @@ namespace MediaBrowser.Api
                 game.PlayersSupported = request.Players;
             }
 
-            var hasAlbumArtists = item as IHasAlbumArtist;
-            if (hasAlbumArtists != null)
+            if (request.AlbumArtists != null)
             {
-                hasAlbumArtists.AlbumArtists = request
-                    .AlbumArtists
-                    .Select(i => i.Name)
-                    .ToList();
+                var hasAlbumArtists = item as IHasAlbumArtist;
+                if (hasAlbumArtists != null)
+                {
+                    hasAlbumArtists.AlbumArtists = request
+                        .AlbumArtists
+                        .Select(i => i.Name)
+                        .ToList();
+                }
             }
 
-            var hasArtists = item as IHasArtist;
-            if (hasArtists != null)
+            if (request.ArtistItems != null)
             {
-                hasArtists.Artists = request
-                    .ArtistItems
-                    .Select(i => i.Name)
-                    .ToList();
+                var hasArtists = item as IHasArtist;
+                if (hasArtists != null)
+                {
+                    hasArtists.Artists = request
+                        .ArtistItems
+                        .Select(i => i.Name)
+                        .ToList();
+                }
             }
 
             var song = item as Audio;
diff --git a/MediaBrowser.Server.Implementations/Devices/DeviceManager.cs b/MediaBrowser.Server.Implementations/Devices/DeviceManager.cs
index b65b7d11b3..fb64a6d285 100644
--- a/MediaBrowser.Server.Implementations/Devices/DeviceManager.cs
+++ b/MediaBrowser.Server.Implementations/Devices/DeviceManager.cs
@@ -233,6 +233,12 @@ namespace MediaBrowser.Server.Implementations.Devices
             }
 
             var user = _userManager.GetUserById(userId);
+
+            if (user == null)
+            {
+                throw new ArgumentException("user not found");
+            }
+
             if (!CanAccessDevice(user.Policy, deviceId))
             {
                 var capabilities = GetCapabilities(deviceId);
diff --git a/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs b/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
index d7a8828c08..a82775de70 100644
--- a/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
+++ b/MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
@@ -17,6 +17,7 @@ using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.LiveTv;
 using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.MediaInfo;
 using MediaBrowser.Model.Querying;
 using MediaBrowser.Model.Serialization;
 using System;
diff --git a/MediaBrowser.Server.Implementations/LiveTv/LiveTvMediaSourceProvider.cs b/MediaBrowser.Server.Implementations/LiveTv/LiveTvMediaSourceProvider.cs
index 9706ed6d25..4a9028af4e 100644
--- a/MediaBrowser.Server.Implementations/LiveTv/LiveTvMediaSourceProvider.cs
+++ b/MediaBrowser.Server.Implementations/LiveTv/LiveTvMediaSourceProvider.cs
@@ -1,10 +1,12 @@
-using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
 using MediaBrowser.Controller.MediaEncoding;
 using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.MediaInfo;
 using MediaBrowser.Model.Serialization;
 using System;
 using System.Collections.Generic;
@@ -21,13 +23,15 @@ namespace MediaBrowser.Server.Implementations.LiveTv
         private readonly ILogger _logger;
         private readonly IMediaSourceManager _mediaSourceManager;
         private readonly IMediaEncoder _mediaEncoder;
+        private readonly IServerApplicationHost _appHost;
 
-        public LiveTvMediaSourceProvider(ILiveTvManager liveTvManager, IJsonSerializer jsonSerializer, ILogManager logManager, IMediaSourceManager mediaSourceManager, IMediaEncoder mediaEncoder)
+        public LiveTvMediaSourceProvider(ILiveTvManager liveTvManager, IJsonSerializer jsonSerializer, ILogManager logManager, IMediaSourceManager mediaSourceManager, IMediaEncoder mediaEncoder, IServerApplicationHost appHost)
         {
             _liveTvManager = liveTvManager;
             _jsonSerializer = jsonSerializer;
             _mediaSourceManager = mediaSourceManager;
             _mediaEncoder = mediaEncoder;
+            _appHost = appHost;
             _logger = logManager.GetLogger(GetType().Name);
         }
 
@@ -74,6 +78,7 @@ namespace MediaBrowser.Server.Implementations.LiveTv
             }
 
             var list = sources.ToList();
+            var serverUrl = _appHost.LocalApiUrl;
 
             foreach (var source in list)
             {
@@ -86,6 +91,12 @@ namespace MediaBrowser.Server.Implementations.LiveTv
                 openKeys.Add(item.Id.ToString("N"));
                 openKeys.Add(source.Id ?? string.Empty);
                 source.OpenToken = string.Join("|", openKeys.ToArray());
+
+                // Dummy this up so that direct play checks can still run
+                if (string.IsNullOrEmpty(source.Path) && source.Protocol == MediaProtocol.Http)
+                {
+                    source.Path = serverUrl;
+                }
             }
 
             _logger.Debug("MediaSources: {0}", _jsonSerializer.SerializeToString(list));
@@ -187,7 +198,7 @@ namespace MediaBrowser.Server.Implementations.LiveTv
                     }
                 }
             }
-            
+
             // Try to estimate this
             if (!mediaSource.Bitrate.HasValue)
             {
diff --git a/MediaBrowser.Server.Implementations/Sync/SyncJobProcessor.cs b/MediaBrowser.Server.Implementations/Sync/SyncJobProcessor.cs
index fd4092974e..04ebcd9034 100644
--- a/MediaBrowser.Server.Implementations/Sync/SyncJobProcessor.cs
+++ b/MediaBrowser.Server.Implementations/Sync/SyncJobProcessor.cs
@@ -458,6 +458,13 @@ namespace MediaBrowser.Server.Implementations.Sync
 
             var syncOptions = _config.GetSyncOptions();
             var user = _userManager.GetUserById(job.UserId);
+            if (user == null)
+            {
+                jobItem.Status = SyncJobItemStatus.Failed;
+                _logger.Error("User not found. Cannot complete the sync job.");
+                await _syncManager.UpdateSyncJobItemInternal(jobItem).ConfigureAwait(false);
+                return;
+            }
 
             var video = item as Video;
             if (video != null)