banshee 0.12.0
ubuntu edgy
5g 80GB iPod

To reproduce bug:

Connect iPod.  When iPod shows up in source list, right click on iPod and select 'iPod Properties'.  Banshee crashes.  Reproducible 100% of the time.

Crash report:

Object reference not set to an instance of an object
System.NullReferenceException: Object reference not set to an instance of an object
  at Banshee.AudioProfiles.GConfProfileConfiguration.SaveActiveProfile (Banshee.AudioProfiles.Profile profile, System.String gconfRoot, System.String id) [0x00006] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Banshee.AudioProfiles/GConfProfileConfiguration.cs:59 
  at Banshee.AudioProfiles.ProfileConfiguration.SaveActiveProfile (Banshee.AudioProfiles.Profile profile, System.String id) [0x00000] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Banshee.AudioProfiles/ProfileConfiguration.cs:75 
  at Banshee.AudioProfiles.Gui.ProfileComboBoxConfigurable+<>AnonHelp<72>.<#AnonymousMethod>71 (System.Object +0, System.EventArgs +1) [0x00000] 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_object_EventArgs (object,System.EventArgs)
  at GLib.Signal.voidObjectCallback (IntPtr handle, IntPtr gch) [0x00000] 
  at (wrapper native-to-managed) GLib.Signal:voidObjectCallback (intptr,intptr)
  at <0x00000> <unknown method>
  at (wrapper managed-to-native) Gtk.ComboBox:gtk_combo_box_set_active_iter (intptr,Gtk.TreeIter&)
  at Gtk.ComboBox.SetActiveIter (TreeIter iter) [0x00000] 
  at Banshee.AudioProfiles.Gui.ProfileComboBox.ReloadProfiles () [0x001cb] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Banshee.AudioProfiles.Gui/ProfileComboBox.cs:100 
  at Banshee.AudioProfiles.Gui.ProfileComboBox.set_MimeTypeFilter (System.String[] value) [0x00007] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Banshee.AudioProfiles.Gui/ProfileComboBox.cs:130 
  at Banshee.Dap.DapPropertiesDialog..ctor (Banshee.Sources.DapSource source) [0x001bc] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Dap/DapPropertiesDialog.cs:94 
  at Banshee.Sources.DapSource.ShowPropertiesDialog () [0x00000] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Sources/DapSource.cs:356 
  at Banshee.PlayerUI.OnSelectedSourcePropertiesAction (System.Object o, System.EventArgs args) [0x00000] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee/PlayerInterface.cs:2101 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_object_EventArgs (object,System.EventArgs)
  at GLib.Signal.voidObjectCallback (IntPtr handle, IntPtr gch) [0x00000] 
  at (wrapper native-to-managed) GLib.Signal:voidObjectCallback (intptr,intptr)
  at <0x00000> <unknown method>
  at (wrapper managed-to-native) Gtk.Application:gtk_main ()
  at Gtk.Application.Run () [0x00000] 
  at Gnome.Program.Run () [0x00000] 
  at Banshee.BansheeEntry.Startup (System.String[] args) [0x0029f] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee/Main.cs:118 
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_string[] (string[])
  at Banshee.Gui.CleanRoomStartup.Startup (Banshee.Gui.StartupInvocationHandler startup, System.String[] args) [0x00045] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Gui/CleanRoomStartup.cs:54 

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Stacktrace:

  at (wrapper managed-to-native) Gtk.Dialog.gtk_dialog_run (intptr) <0x00004>
  at (wrapper managed-to-native) Gtk.Dialog.gtk_dialog_run (intptr) <0xffffffff>
  at Gtk.Dialog.Run () <0x00024>
  at Banshee.Gui.CleanRoomStartup.Startup (Banshee.Gui.CleanRoomStartup/StartupInvocationHandler,string[]) [0x00074] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee.Base/Gui/CleanRoomStartup.cs:61
  at Banshee.BansheeEntry.Main (string[]) [0x00000] in /home/vek/downloads/banshee-0.12.0/src/Core/Banshee/Main.cs:43
  at (wrapper runtime-invoke) System.Object.runtime_invoke_void_string[] (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono(mono_handle_native_sigsegv+0xde) [0x815644e]
        mono [0x8122c88]
        [0xffffe440]
        /usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29) [0xb6256279]
        /usr/lib/libgobject-2.0.so.0 [0xb6248d11]
        /usr/lib/libgobject-2.0.so.0 [0xb624556f]
        /usr/lib/libgobject-2.0.so.0(g_object_notify+0x2b2) [0xb6249852]
        /usr/lib/libgtk-x11-2.0.so.0(gtk_container_set_border_width+0x61) [0xb65a40c1]
        /usr/lib/libgtk-x11-2.0.so.0 [0xb65b5c2e]
        /usr/lib/libgobject-2.0.so.0(g_cclosure_marshal_VOID__OBJECT+0x59) [0xb6251039]
        /usr/lib/libgobject-2.0.so.0 [0xb6242fb9]
        /usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x12b) [0xb624479b]
        /usr/lib/libgobject-2.0.so.0 [0xb625502a]
        /usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x8c7) [0xb62560b7]
        /usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29) [0xb6256279]
        /usr/lib/libgtk-x11-2.0.so.0 [0xb6751fc2]
        /usr/lib/libgtk-x11-2.0.so.0 [0xb669ccd7]
        /usr/lib/libgtk-x11-2.0.so.0(_gtk_size_group_compute_requisition+0x5a) [0xb669cf4a]
        /usr/lib/libgtk-x11-2.0.so.0(gtk_widget_size_request+0x4c) [0xb6751b2c]
        /usr/lib/libgtk-x11-2.0.so.0 [0xb6759d10]
        /usr/lib/libgtk-x11-2.0.so.0 [0xb6762fc1]
        /usr/lib/libgobject-2.0.so.0(g_cclosure_marshal_VOID__VOID+0x49) [0xb6251b29]
        /usr/lib/libgobject-2.0.so.0 [0xb6242fb9]
        /usr/lib/libgobject-2.0.so.0(g_closure_invoke+0x12b) [0xb624479b]
        /usr/lib/libgobject-2.0.so.0 [0xb625502a]
        /usr/lib/libgobject-2.0.so.0(g_signal_emit_valist+0x8c7) [0xb62560b7]
        /usr/lib/libgobject-2.0.so.0(g_signal_emit+0x29) [0xb6256279]
        /usr/lib/libgtk-x11-2.0.so.0(gtk_widget_show+0x58) [0xb6752b18]
        /usr/lib/libgtk-x11-2.0.so.0(gtk_dialog_run+0x248) [0xb65b4eb8]
        [0xb145409d]
        [0xb145404d]
        [0xb73df9a4]
        [0xb73dec69]
        [0xb73dea73]
        mono(mono_runtime_exec_main+0x62) [0x80996b2]
        mono(mono_runtime_run_main+0x1b9) [0x8099999]
        mono(mono_main+0xe47) [0x805d477]
        mono [0x805c122]
        /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xdc) [0xb7ce28cc]
        mono [0x805c071]
Aborted (core dumped)