Index: src/Extensions/Banshee.Lastfm/Banshee.Lastfm.Recommendations/RecommendationService.cs
===================================================================
--- src/Extensions/Banshee.Lastfm/Banshee.Lastfm.Recommendations/RecommendationService.cs	(revision 4321)
+++ src/Extensions/Banshee.Lastfm/Banshee.Lastfm.Recommendations/RecommendationService.cs	(working copy)
@@ -110,7 +110,7 @@
 
         private void UpdateVisibility ()
         {
-            bool source_is_playback_source = (ServiceManager.SourceManager.ActiveSource == ServiceManager.PlaybackController.Source);
+            bool source_is_playback_source = (ServiceManager.SourceManager.ActiveSource as Banshee.Sources.ITrackModelSource) == ServiceManager.PlaybackController.Source;
             pane.ShowWhenReady = ShowSchema.Get () && source_is_playback_source;
             if (!source_is_playback_source) {
                 pane.HideWithTimeout ();
Index: src/Libraries/Hyena/Hyena.Collections/QueuePipelineElement.cs
===================================================================
--- src/Libraries/Hyena/Hyena.Collections/QueuePipelineElement.cs	(revision 4321)
+++ src/Libraries/Hyena/Hyena.Collections/QueuePipelineElement.cs	(working copy)
@@ -32,12 +32,12 @@
 
 namespace Hyena.Collections
 {
+    internal class ElementProcessCanceledException : ApplicationException
+    {
+    }
+    
     public abstract class QueuePipelineElement<T> where T : class
     {
-        private class ElementProcessCanceledException : ApplicationException
-        {
-        }
-    
         private Queue<T> queue = new Queue<T> ();
         private object monitor = new object ();
         private AutoResetEvent thread_wait;