This report was originally filled at:
https://bugs.launchpad.net/ubuntu/+source/banshee/+bug/798983


I had downloaded two albums from Amazon, and created a new equalizer setting to try to compensate for my netbook's terrible speakers. This turned out to be impossible, so I clicked the minus-sign button in the equalizer window. This caused Banshee to hang, in that its windows no longer respond to input and don't redraw themselves. I've run ubuntu-bug against the running process.


Banshee Debug:
Marshaling clicked signal
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at Banshee.Equalizer.Gui.EqualizerPresetComboBox.set_ActiveEqualizer (Banshee.Equalizer.EqualizerSetting value) [0x0000d] in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Equalizer.Gui/EqualizerPresetComboBox.cs:199 
  at Banshee.Equalizer.Gui.EqualizerPresetComboBox.ActivateFirstEqualizer () [0x00013] in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Equalizer.Gui/EqualizerPresetComboBox.cs:129 
  at Banshee.Equalizer.Gui.EqualizerPresetComboBox.RemoveEqualizerSetting (Banshee.Equalizer.EqualizerSetting eq) [0x00062] in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Equalizer.Gui/EqualizerPresetComboBox.cs:165 
  at Banshee.Equalizer.Gui.EqualizerPresetComboBox.<BuildWidget>m__21 (System.Object o, Hyena.EventArgs`1 e) [0x00000] in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Equalizer.Gui/EqualizerPresetComboBox.cs:92 
  at (wrapper delegate-invoke) Banshee.Equalizer.EqualizerManager/EqualizerSettingEventHandler:invoke_void__this___object_EventArgs`1<EqualizerSetting> (object,Hyena.EventArgs`1<Banshee.Equalizer.EqualizerSetting>)
  at Banshee.Equalizer.EqualizerManager.OnEqualizerRemoved (Banshee.Equalizer.EqualizerSetting eq) [0x0000d] in /build/buildd/banshee-2.1.0/src/Core/Banshee.Services/Banshee.Equalizer/EqualizerManager.cs:341 
  at Banshee.Equalizer.EqualizerManager.Remove (Banshee.Equalizer.EqualizerSetting eq, Boolean shouldQueueSave) [0x00031] in /build/buildd/banshee-2.1.0/src/Core/Banshee.Services/Banshee.Equalizer/EqualizerManager.cs:107 
  at Banshee.Equalizer.EqualizerManager.Remove (Banshee.Equalizer.EqualizerSetting eq) [0x00000] in /build/buildd/banshee-2.1.0/src/Core/Banshee.Services/Banshee.Equalizer/EqualizerManager.cs:96 
  at Banshee.Equalizer.Gui.EqualizerWindow.OnDeletePreset (System.Object o, System.EventArgs args) [0x00000] in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Equalizer.Gui/EqualizerWindow.cs:154 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <filename unknown>:0 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] in <filename unknown>:0 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GLib.SignalClosure.MarshalCallback(IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Banshee.Gui.GtkBaseClient.Run() in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:line 204
   at Banshee.Gui.GtkBaseClient.Startup() in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:line 82
   at Hyena.Gui.CleanRoomStartup.Startup(Hyena.Gui.StartupInvocationHandler startup) in /build/buildd/banshee-2.1.0/src/Hyena/Hyena.Gui/Hyena.Gui/CleanRoomStartup.cs:line 54
   at Banshee.Gui.GtkBaseClient.Startup() in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:line 77
   at Banshee.Gui.GtkBaseClient.Startup(System.String[] args) in /build/buildd/banshee-2.1.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:line 67
   at Nereid.Client.Main(System.String[] args) in /build/buildd/banshee-2.1.0/src/Clients/Nereid/Nereid/Client.cs:line 54
   at System.AppDomain.ExecuteAssembly(System.Reflection.Assembly , System.String[] )
   at System.AppDomain.ExecuteAssemblyInternal(System.Reflection.Assembly a, System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.String assemblyFile, System.Security.Policy.Evidence assemblySecurity, System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.String assemblyFile)
   at Booter.Booter.BootClient(System.String clientName) in /build/buildd/banshee-2.1.0/src/Clients/Booter/Booter/Entry.cs:line 112
   at Booter.Booter.Main() in /build/buildd/banshee-2.1.0/src/Clients/Booter/Booter/Entry.cs:line 105
Terminado (killed)