Steps to reproduce:
1. load banshee
2. start importing some new music (maybe not relevant)
3. click "delete playlist"
4. crash


Stack trace:
Warning: [09/03/2006 11:08:22] (Cannot connect to NetworkManager) - An
available, working network connection will be assumed
Debug: [09/03/2006 11:08:23] (Changed active playback engine) - GStreamer 0.10
Debug: [09/03/2006 11:08:23] (Loaded primary playback engine) - GStreamer 0.10
Debug: [09/03/2006 11:08:23] (Loaded Audio CD playback engine) - GStreamer 0.10
Debug: [09/03/2006 11:08:23] (Audio CD Core Initialised) -
Debug: [09/03/2006 11:08:23] (Registering Inotify watch) - /home/drodgman/Music
Starting Inotify threads

(Banshee:3813): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without calling
gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the
data stream to the loader before dropping the last reference.

(Banshee:3813): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without calling
gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the
data stream to the loader before dropping the last reference.
Building initial DAAP database from local library...
Starting DAAP Server
Scanning library for tracks to update
Done scanning library
Processing track queue for pending queries
Done processing track queue
Cannot Import: /mnt/music/iTunes Music/1 Giant Leap/The Karma Collection Disc
2/13 Racing Away.mp3 (System.ApplicationException, Song is already in library)
Cannot Import: /mnt/music/iTunes Music/Adam Kay & Suman Biswas/Fitness To
Practice/01 Paracetamoxyfrusebendroneomycin.mp3 (System.ApplicationException,
Song is already in library)
Cannot Import: /mnt/music/iTunes Music/Adam Kay & Suman Biswas/Fitness To
Practice/02 Nothing At All.mp3 (System.ApplicationException, Song is already in
library)
Cannot Import: /mnt/music/iTunes Music/Adam Kay & Suman Biswas/Fitness To
Practice/03 Finals Countdown.mp3 (System.ApplicationException, Song is already
in library)

....

Cannot Import: /mnt/music/iTunes Music/Belle And Sebastian/If You're Feeling
Sinister/08 Mayfly.mp3 (System.ApplicationException, Song is already in library)
Cannot Import: /mnt/music/iTunes Music/Belle And Sebastian/If You're Feeling
Sinister/09 The Boy Done Wrong Again.mp3 (System.ApplicationException, Song is
already in library)
Cannot Import: /mnt/music/iTunes Music/Belle And Sebastian/If You're Feeling
Sinister/10 Judy And The Dream Of Horses.mp3 (System.ApplicationException, Song
is already in library)

(Banshee:3813): Gtk-CRITICAL **: gtk_tree_model_iter_nth_child: assertion `n >=
0' failed

Unhandled Exception: System.InvalidOperationException: Hashtable.Enumerator:
snapshot out of sync.
in <0x00038> Enumerator:FailFast ()
in <0x0001e> Enumerator:MoveNext ()
in <0x00084> Banshee.PlaylistModel:ReloadSource ()
in <0x0000d> <>AnonHelp<19>:<#AnonymousMethod>24 (Banshee.Sources.SourceEventArgs)
in <0x0003b> (wrapper delegate-invoke)
System.MulticastDelegate:invoke_void_SourceEventArgs
(Banshee.Sources.SourceEventArgs)
in <0x0003b> Banshee.Sources.SourceManager:<#AnonymousMethod>7
(object,System.EventArgs)
in <0x00051> (wrapper delegate-invoke)
System.MulticastDelegate:invoke_void_object_EventArgs (object,System.EventArgs)
in <0x0001a> InvokeCB:Invoke ()
in <0x00037> (wrapper delegate-invoke) System.MulticastDelegate:invoke_bool ()
in <0x0002a> TimeoutProxy:Handler ()
in <0x00036> (wrapper native-to-managed) TimeoutProxy:Handler ()
in (unmanaged) 0x77d9f3a7
in <0x00004> (wrapper managed-to-native) Gtk.Application:gtk_main ()
in <0x00007> Gtk.Application:Run ()
in <0x005a6> Banshee.BansheeEntry:Startup (string[])
in <0x0000a> Banshee.BansheeEntry:Main (string[])


=================================================================
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:

in (wrapper managed-to-native) Banshee.Base.Gstreamer:gstreamer_detect_mimetype
(intptr) <0x4>
in (wrapper managed-to-native) Banshee.Base.Gstreamer:gstreamer_detect_mimetype
(intptr) <0xfffffd95>
in Banshee.Base.Gstreamer:DetectMimeType (System.Uri) <0x35>
in Banshee.Base.LibraryTrackInfo:LoadFromFile (string) <0x33>
in Banshee.Base.LibraryTrackInfo:.ctor (string) <0x59>
in Banshee.PlayerUI:OnImportManagerImportRequested
(object,Banshee.Base.ImportEventArgs) <0x65>
in (wrapper delegate-invoke)
System.MulticastDelegate:invoke_void_object_ImportEventArgs
(object,Banshee.Base.ImportEventArgs) <0xfffffec7>
in Banshee.Base.ImportManager:ProcessQueue () <0x97>
in <>AnonHelp<18>:<#AnonymousMethod>12 () <0x9f>
in (wrapper delegate-invoke) System.MulticastDelegate:invoke_void () <0xffffff90>
in (wrapper runtime-invoke) System.Object:runtime_invoke_void
(object,intptr,intptr,intptr) <0x16ad5ef>

Native stacktrace:

banshee version 10.7
mono version 1.1.13.4-0ubuntu3

Other information: