This is also affecting me.

It happens more often when you click ahead in the timer rather than slide the slider along.

Here's the debug output up until the point of crashing:


** Running Mono with --debug   **
[1 Info  13:32:18.760] Running Banshee 2.0.0: [Ubuntu Natty (development branch) (linux-gnu, x86_64) @ 2011-04-18 16:18:52 UTC]
[1 Debug 13:32:18.775] Initializing GTK
[1 Debug 13:32:19.979] Post-Initializing GTK
[1 Debug 13:32:19.988] Configuration client extension loaded (Banshee.GnomeBackend.GConfConfigurationClient)
[1 Debug 13:32:19.997] Using default gconf-base-key
[1 Debug 13:32:20.032] Bus.Session.RequestName ('org.bansheeproject.Banshee') replied with PrimaryOwner
[1 Debug 13:32:20.101] Core service started (DBusServiceManager, 0.001071)
[1 Debug 13:32:20.103] Registering remote object /org/bansheeproject/Banshee/DBusCommandService (Banshee.ServiceStack.DBusCommandService) on org.bansheeproject.Banshee
[1 Debug 13:32:20.111] Core service started (DBusCommandService, 0.00997)
[1 Debug 13:32:20.145] Opened SQLite (version 3.7.4) connection to /home/jude/.config/banshee-1/banshee.db
[1 Debug 13:32:20.146] Core service started (DbConnection, 0.034594)
[1 Debug 13:32:20.153] Database version 43 is up to date
[1 Debug 13:32:20.181] Core service started (PreferenceService, 0.011322)
[1 Debug 13:32:20.188] Core service started (Network, 0.006713)
[1 Debug 13:32:20.189] Registering remote object /org/bansheeproject/Banshee/SourceManager (Banshee.Sources.SourceManager) on org.bansheeproject.Banshee
[1 Debug 13:32:20.189] Core service started (SourceManager, 0.000676)
[1 Debug 13:32:20.199] Core service started (MediaProfileManager, 0.000235)
[1 Debug 13:32:20.201] Registering remote object /org/bansheeproject/Banshee/PlayerEngine (Banshee.MediaEngine.PlayerEngineService) on org.bansheeproject.Banshee
[1 Debug 13:32:20.203] Core service started (PlayerEngine, 0.004589)
[1 Debug 13:32:20.218] Registering remote object /org/bansheeproject/Banshee/PlaybackController (Banshee.PlaybackController.PlaybackControllerService) on org.bansheeproject.Banshee
[1 Debug 13:32:20.219] Core service started (PlaybackController, 0.002429)
[1 Debug 13:32:20.226] Starting - Startup Job
[1 Debug 13:32:20.228] Core service started (JobScheduler, 0.00833)
[1 Debug 13:32:20.239] IO provider extension loaded (Banshee.IO.Gio.Provider)
[1 Debug 13:32:20.267] Loaded HardwareManager backend: Banshee.Hardware.Gio
[1 Debug 13:32:20.269] Core service started (HardwareManager, 0.041734)
[1 Debug 13:32:20.271] Bus.Session.RequestName ('org.bansheeproject.CollectionIndexer') replied with PrimaryOwner
[1 Debug 13:32:20.272] Registering remote object /org/bansheeproject/Banshee/CollectionIndexerService (Banshee.Collection.Indexer.CollectionIndexerService) on org.bansheeproject.CollectionIndexer
[1 Debug 13:32:20.274] Core service started (CollectionIndexerService, 0.004342)
[1 Debug 13:32:20.275] Core service started (SaveTrackMetadataService, 0.001378)
[1 Debug 13:32:20.282] Adding icon theme search path: /usr/share/banshee/icons
[1 Debug 13:32:20.283] Core service started (GtkElementsService, 0.007788)
[1 Debug 13:32:20.284] Core service started (InterfaceActionService, 0.001232)
[1 Debug 13:32:20.329] Loaded new mode into  shuffler: mirage_similar
[1 Debug 13:32:20.388] Extension actions loaded: MetadataFixActions
[1 Debug 13:32:20.388] Registering remote object /org/bansheeproject/Banshee/GlobalUIActions (Banshee.Gui.GlobalActions) on org.bansheeproject.Banshee
[1 Debug 13:32:20.390] Album artwork path set to /home/jude/.cache/media-art
[1 Debug 13:32:20.411] Core service started (ArtworkManager, 0.022341)
[1 Debug 13:32:20.411] Core service started (BookmarksService, 0.000124)
[1 Debug 13:32:20.587] Adding context page lastfm-recommendations
[1 Debug 13:32:20.605] Adding context page wikipedia
[1 Debug 13:32:20.718] Adding context page YouTube
[1 Debug 13:32:20.913] Constructed Nereid interface: 0.469697
[1 Debug 13:32:20.979] Creating new surface cache for 90px images, capped at 0.93 MiB (30 items)
[1 Debug 13:32:21.019] Registering remote object /org/bansheeproject/Banshee/ClientWindow (Nereid.PlayerInterface) on org.bansheeproject.Banshee
[1 Debug 13:32:21.019] Core service started (NereidPlayerInterface, 0.595417)
[1 Debug 13:32:21.045] Extension service started (GStreamerCoreService, 0.02517)
[1 Debug 13:32:21.051] Extension service started (BpmService, 0.005286)
[1 Debug 13:32:21.054] Using GNOME 2.22 API for Multimedia Keys
[1 Debug 13:32:21.054] Extension service started (MultimediaKeysService, 0.003252)
[1 Debug 13:32:21.056] Extension service started (LibraryWatcherService, 0.00164)
[1 Debug 13:32:21.057] Extension service started (DapService, 0.001401)
[1 Debug 13:32:21.060] Extension service started (PodcastService, 0.002747)
[1 Debug 13:32:21.069] Extension service started (MprisService, 0.008658)
[1 Debug 13:32:21.076] Extension service started (SoundMenuService, 0.006999)
[1 Debug 13:32:21.077] Extension service started (DaapService, 0.001679)
[1 Info  13:32:21.081] Updating web proxy from GConf
[1 Debug 13:32:21.086] Direct connection, no proxy in use
[1 Debug 13:32:21.107] Extension service started (GnomeService, 0.029141)
[1 Debug 13:32:21.120] Audioscrobbler state: connected
[1 Debug 13:32:21.122] Extension service started (AudioscrobblerService, 0.015374)
[1 Debug 13:32:21.124] Extension service started (AmazonMp3DownloaderService, 0.001963)
[1 Debug 13:32:21.126] Extension service started (CoverArtService, 0.001768)
[1 Debug 13:32:21.149] Extension service started (AudioCdService, 0.022668)
[1 Debug 13:32:21.149] Extension service started (MirageService, 0.000178)
[1 Info  13:32:21.150] All services are started 1.116158
[1 Debug 13:32:21.561] Creating Pango.Layout, configuring Cairo.Context
[1 Debug 13:32:21.784] Loaded new mode into  shuffler: mirage_similar
[1 Debug 13:32:22.015] Registering remote object /org/bansheeproject/Banshee/SourceManager/PlayQueue (Banshee.PlayQueue.PlayQueueSource) on org.bansheeproject.Banshee
[1 Debug 13:32:22.015] Extension source loaded: Play Queue
[1 Debug 13:32:22.020] Extension source loaded: Now Playing
[1 Debug 13:32:22.040] Extension source loaded: Last.fm
[1 Debug 13:32:22.082] Extension source loaded: Magnatune
[1 Debug 13:32:22.094] Extension source loaded: Radio
[1 Debug 13:32:22.146] Extension source loaded: File System Queue
[1 Debug 13:32:22.153] Extension source loaded: Amazon MP3 Store
** (Banshee:18179): DEBUG: SyncDaemon already running, initializing SyncdaemonDaemon object

(Banshee:18179): libsoup-WARNING **: No feature manager for feature of type 'U1RequestChrome'

** (Banshee:18179): WARNING **: Error calling get_info: Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/dbus/service.py", line 702, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/pymodules/python2.7/ubuntuone-client/ubuntuone/platform/linux/dbus_interface.py", line 992, in get_info
    return self.syncdaemon_folders.get_info(path)
  File "/usr/lib/pymodules/python2.7/ubuntuone-client/ubuntuone/syncdaemon/interaction_interfaces.py", line 634, in get_info
    mdobj = self.fs.get_by_path(path.encode('utf-8'))
  File "/usr/lib/pymodules/python2.7/ubuntuone-client/ubuntuone/syncdaemon/filesystem_manager.py", line 773, in get_by_path
    mdid = self._idx_path[path]
KeyError: '/home/jude/.ubuntuone/Purchased from Ubuntu One'


** (Banshee:18179): CRITICAL **: syncdaemon_folder_info_get_subscribed: assertion `SYNCDAEMON_IS_FOLDER_INFO (finfo)' failed
[1 Debug 13:32:22.179] Extension source loaded: Ubuntu One Music Store
[1 Debug 13:32:22.187] Extension source loaded: Miro Guide
[1 Debug 13:32:22.200] Extension source loaded: Internet Archive
[1 Debug 13:32:22.219] Extension source loaded: Audiobooks
[1 Debug 13:32:22.223] Starting GTK main loop

** (Banshee:18179): WARNING **: Error rescanning Purchased Music: No such file or directory
[1 Debug 13:32:22.301] Growing surface cache for 90px images to 1.85 MiB (60 items)
[1 Debug 13:32:22.426] Creating Pango.Layout, configuring Cairo.Context
[1 Debug 13:32:22.495] Creating Pango.Layout, configuring Cairo.Context
** (Banshee:18179): DEBUG: Loading the real store page

** (Banshee:18179): WARNING **: Got less number of items in credentials hash table than expected!
[1 Info  13:32:22.692] nereid Client Started
[1 Debug 13:32:22.695] Delayed Initializating Banshee.MediaEngine.PlayerEngineService
[1 Debug 13:32:22.699] (libbanshee:player) Stream volume supported: YES
[1 Debug 13:32:22.702] (libbanshee:player) Audiosink has volume: NO
[1 Debug 13:32:22.710] (libbanshee:player) Using system (gst-plugins-good) equalizer element
[1 Debug 13:32:22.749] Player state change: NotReady -> Ready
[1 Debug 13:32:22.759] Loaded equalizer presets: 0.006794
[1 Debug 13:32:22.762] Selected equalizer: Rock
[1 Debug 13:32:22.767] Player state change: Ready -> Idle
[1 Debug 13:32:22.770] (libbanshee:player) Enabled ReplayGain
[1 Debug 13:32:22.775] (libbanshee:player) scaled volume: 1.00 (ReplayGain) * 0.00 (User) = 0.00
[1 Info  13:32:22.777] GStreamer version 0.10.32.0, gapless: True, replaygain: True
[1 Debug 13:32:22.777] (libbanshee:player) scaled volume: 1.00 (ReplayGain) * 0.80 (User) = 0.80
[1 Debug 13:32:22.781] Delayed Initializating Banshee.LibraryWatcher.LibraryWatcherService
[1 Debug 13:32:22.790] Core service started (LibraryImportManager, 0.004693)
[1 Debug 13:32:22.866] Started LibraryWatcher for Music (/home/jude/Music/)
[1 Debug 13:32:22.867] Started LibraryWatcher for Videos (/home/jude/Videos/)
[1 Debug 13:32:22.867] Delayed Initializating Banshee.Dap.DapService
[1 Debug 13:32:22.875] Dap support extension loaded: Banshee.Dap.MassStorage
[1 Debug 13:32:22.877] Dap support extension loaded: Banshee.Dap.AppleDevice
[1 Debug 13:32:22.878] Dap support extension loaded: Banshee.Dap.Mtp
[1 Debug 13:32:22.884] Delayed Initializating Banshee.Podcasting.PodcastService
[2 Info  13:32:22.900] AppleDeviceSource is ignoring unmounted volume 250 GB File system
[1 Debug 13:32:22.960] Delayed Initializating Banshee.Daap.DaapService
[1 Debug 13:32:22.961] Delayed Initializating Banshee.Mirage.MiragePlugin
[3 Debug 13:32:22.980] Refreshing any podcasts that haven't been updated in over an hour
[2 Info  13:32:22.983] AppleDeviceSource is ignoring unmounted volume 123 GB File system
[4 Debug 13:32:23.076] DAAP Proxy listening for connections on port 8089
[1 Debug 13:32:23.981] Finished - Startup Job
[1 Debug 13:32:23.985] Starting - Downloading Cover Art
[1 Debug 13:32:23.986] Starting - Analyzing Song Similarity
[5 Debug 13:32:24.007] Finished - Analyzing Song Similarity
[6 Debug 13:32:24.010] Finished - Downloading Cover Art
[1 Debug 13:32:24.225] U1MS: Url Loaded:  - http://stores.7digital.com/default.aspx?shop=34&partner=983
[1 Debug 13:32:25.295] EqualizerManager - Saved equalizers to disk
[1 Debug 13:32:29.026] Querying model for track to play in song:Next mode
[1 Debug 13:32:29.037] Player state change: Idle -> Loading
[1 Debug 13:32:29.097] Player state change: Loading -> Loaded
[1 Debug 13:32:29.103] (libbanshee:player) [gapless] Triggering track-change signal
[1 Info  13:32:29.130] Uncached artwork size 175 requested
[1 Debug 13:32:29.135] Player state change: Loaded -> Playing
[1 Debug 13:32:29.142] Creating Pango.Layout, configuring Cairo.Context
[1 Debug 13:32:29.142] Creating Pango.Layout, configuring Cairo.Context
[1 Debug 13:32:30.142] TrackInfoDisplay RenderAnimation: 32.00 FPS
[1 Debug 13:32:30.151] TrackInfoDisplay RenderAnimation: 32.00 FPS
[1 Debug 13:32:30.282] Starting - Saving Metadata to File
[7 Debug 13:32:30.289] Finished - Saving Metadata to File
[1 Debug 13:32:34.841] (libbanshee:player) bp_stop: setting state to GST_STATE_NULL
[1 Debug 13:32:34.846] Player state change: Playing -> Idle
[1 Debug 13:32:34.848] Player state change: Idle -> Loading
[1 Debug 13:32:34.879] Player state change: Loading -> Loaded
[1 Debug 13:32:34.880] (libbanshee:player) [gapless] Triggering track-change signal
[1 Debug 13:32:34.882] Player state change: Loaded -> Playing
[1 Debug 13:32:35.895] TrackInfoDisplay RenderAnimation: 32.00 FPS
[1 Debug 13:32:35.895] TrackInfoDisplay RenderAnimation: 32.00 FPS