fix duplicate connections on the dashboard

MediaBrowser.Controller/Drawing/ImageExtensions.cs

@@ -64,6 +64,39 @@ namespace MediaBrowser.Controller.Drawing
             return encoders.FirstOrDefault(i => i.MimeType.Equals(mimeType, StringComparison.OrdinalIgnoreCase)) ?? encoders.FirstOrDefault();
         }
 
+        /// <summary>
+        /// Determines whether [is pixel format supported by graphics object] [the specified format].
+        /// </summary>
+        /// <param name="format">The format.</param>
+        /// <returns><c>true</c> if [is pixel format supported by graphics object] [the specified format]; otherwise, <c>false</c>.</returns>
+        public static bool IsPixelFormatSupportedByGraphicsObject(PixelFormat format)
+        {
+            // http://msdn.microsoft.com/en-us/library/system.drawing.graphics.fromimage.aspx
+
+            if (format.HasFlag(PixelFormat.Indexed))
+            {
+                return false;
+            }
+            if (format.HasFlag(PixelFormat.Undefined))
+            {
+                return false;
+            }
+            if (format.HasFlag(PixelFormat.DontCare))
+            {
+                return false;
+            }
+            if (format.HasFlag(PixelFormat.Format16bppArgb1555))
+            {
+                return false;
+            }
+            if (format.HasFlag(PixelFormat.Format16bppGrayScale))
+            {
+                return false;
+            }
+
+            return true;
+        }
+
         /// <summary>
         /// Crops an image by removing whitespace and transparency from the edges
         /// </summary>

MediaBrowser.Controller/Drawing/ImageManager.cs

@@ -179,7 +179,7 @@ namespace MediaBrowser.Controller.Drawing
                     var newHeight = Convert.ToInt32(newSize.Height);
 
                     // Graphics.FromImage will throw an exception if the PixelFormat is Indexed, so we need to handle that here
-                    var thumbnail = originalImage.PixelFormat.HasFlag(PixelFormat.Indexed) ? new Bitmap(originalImage, newWidth, newHeight) : new Bitmap(newWidth, newHeight, originalImage.PixelFormat);
+                    var thumbnail = !ImageExtensions.IsPixelFormatSupportedByGraphicsObject(originalImage.PixelFormat) ? new Bitmap(originalImage, newWidth, newHeight) : new Bitmap(newWidth, newHeight, originalImage.PixelFormat);
 
                     // Preserve the original resolution
                     thumbnail.SetResolution(originalImage.HorizontalResolution, originalImage.VerticalResolution);

MediaBrowser.Controller/Library/IUserManager.cs

@@ -20,7 +20,7 @@ namespace MediaBrowser.Controller.Library
         /// Gets the active connections.
         /// </summary>
         /// <value>The active connections.</value>
-        IEnumerable<ClientConnectionInfo> ConnectedUsers { get; }
+        IEnumerable<ClientConnectionInfo> RecentConnections { get; }
 
         /// <summary>
         /// Occurs when [playback start].