In Rhythmox or Gnomad2 it works properly. Maybe this could help:

 banshee --debug
** Running Mono with --debug   **
[1 Info  18:38:01.072] Running Banshee 2.2.0: [Ubuntu oneiric (development branch) (linux-gnu, x86_64) @ 2011-09-23 04:47:58 UTC]
[1 Debug 18:38:01.084] Initializing GTK
[1 Debug 18:38:01.834] Post-Initializing GTK
[1 Debug 18:38:01.842] Configuration client extension loaded (Banshee.GnomeBackend.GConfConfigurationClient)
[1 Debug 18:38:01.844] Using default gconf-base-key
[1 Debug 18:38:01.883] Bus.Session.RequestName ('org.bansheeproject.Banshee') replied with PrimaryOwner
[1 Debug 18:38:01.930] Core service started (DBusServiceManager, 0,001283)
[1 Debug 18:38:01.932] Registering remote object /org/bansheeproject/Banshee/DBusCommandService (Banshee.ServiceStack.DBusCommandService) on org.bansheeproject.Banshee
[1 Debug 18:38:01.938] Core service started (DBusCommandService, 0,007693)
[1 Debug 18:38:01.964] Opened SQLite (version 3.7.7) connection to /home/binturong/.config/banshee-1/banshee.db
[1 Debug 18:38:01.964] Core service started (DbConnection, 0,025811)
[1 Debug 18:38:01.969] Database version 44 is up to date
[1 Debug 18:38:01.995] Core service started (PreferenceService, 0,01332)
[1 Debug 18:38:02.003] Core service started (Network, 0,007454)
[1 Debug 18:38:02.003] Registering remote object /org/bansheeproject/Banshee/SourceManager (Banshee.Sources.SourceManager) on org.bansheeproject.Banshee
[1 Debug 18:38:02.003] Core service started (SourceManager, 0,000623)
[1 Debug 18:38:02.007] Core service started (MediaProfileManager, 0,000252)
[1 Debug 18:38:02.010] Registering remote object /org/bansheeproject/Banshee/PlayerEngine (Banshee.MediaEngine.PlayerEngineService) on org.bansheeproject.Banshee
[1 Debug 18:38:02.011] Core service started (PlayerEngine, 0,004024)
[1 Debug 18:38:02.025] Registering remote object /org/bansheeproject/Banshee/PlaybackController (Banshee.PlaybackController.PlaybackControllerService) on org.bansheeproject.Banshee
[1 Debug 18:38:02.026] Core service started (PlaybackController, 0,002433)
[1 Debug 18:38:02.030] Starting - Startup Job
[1 Debug 18:38:02.032] Core service started (JobScheduler, 0,005636)
[1 Debug 18:38:02.041] IO provider extension loaded (Banshee.IO.Gio.Provider)
[1 Debug 18:38:02.075] Loaded HardwareManager backend: Banshee.Hardware.Gio
[1 Debug 18:38:02.076] Core service started (HardwareManager, 0,044219)
[1 Debug 18:38:02.080] Bus.Session.RequestName ('org.bansheeproject.CollectionIndexer') replied with PrimaryOwner
[1 Debug 18:38:02.081] Registering remote object /org/bansheeproject/Banshee/CollectionIndexerService (Banshee.Collection.Indexer.CollectionIndexerService) on org.bansheeproject.CollectionIndexer
[1 Debug 18:38:02.082] Core service started (CollectionIndexerService, 0,006131)
[1 Debug 18:38:02.084] Core service started (SaveTrackMetadataService, 0,001202)
[1 Debug 18:38:02.089] Adding icon theme search path: /usr/share/banshee/icons
[1 Debug 18:38:02.090] Core service started (GtkElementsService, 0,006272)
[1 Debug 18:38:02.091] Core service started (InterfaceActionService, 0,001075)
[1 Debug 18:38:02.171] Extension actions loaded: MetadataFixActions
[1 Debug 18:38:02.172] Registering remote object /org/bansheeproject/Banshee/GlobalUIActions (Banshee.Gui.GlobalActions) on org.bansheeproject.Banshee
[1 Debug 18:38:02.173] Album artwork path set to /home/binturong/.cache/media-art
[1 Debug 18:38:02.191] Core service started (ArtworkManager, 0,019402)
[1 Debug 18:38:02.192] Core service started (BookmarksService, 0,000131)
[1 Debug 18:38:02.344] Adding context page YouTube
[1 Debug 18:38:02.355] Adding context page wikipedia
[1 Debug 18:38:02.523] Constructed Nereid interface: 0,301987
[1 Debug 18:38:02.587] Creating new surface cache for 90px images, capped at 0,93 MiB (30 items)
[1 Debug 18:38:02.619] Registering remote object /org/bansheeproject/Banshee/ClientWindow (Nereid.PlayerInterface) on org.bansheeproject.Banshee
[1 Debug 18:38:02.619] Core service started (NereidPlayerInterface, 0,419383)
[1 Debug 18:38:02.626] Using GNOME 2.22 API for Multimedia Keys
[1 Debug 18:38:02.627] Extension service started (MultimediaKeysService, 0,006662)
[1 Debug 18:38:02.628] Extension service started (DapService, 0,000863)
[1 Debug 18:38:02.644] Extension service started (MprisService, 0,015805)
[1 Warn  18:38:02.668] Failed to load media-player-info file for 1
[1 Debug 18:38:02.679] Extension service started (AudioCdService, 0,034759)
[1 Debug 18:38:02.697] Extension service started (GStreamerCoreService, 0,018521)
[1 Debug 18:38:02.699] Extension service started (LibraryWatcherService, 0,001218)
[1 Info  18:38:02.703] Updating web proxy from GConf
[1 Debug 18:38:02.710] Direct connection, no proxy in use
[1 Debug 18:38:02.723] Extension service started (GnomeService, 0,024752)
[1 Debug 18:38:02.727] Extension service started (CoverArtService, 0,003038)
[1 Info  18:38:02.729] All services are started 0,845149
[1 Debug 18:38:03.229] Creating Pango.Layout, configuring Cairo.Context
[1 Debug 18:38:03.519] Extension source loaded: Rádio
[1 Debug 18:38:03.523] Extension source loaded: Právě se přehrává
[1 Debug 18:38:03.859] Registering remote object /org/bansheeproject/Banshee/SourceManager/PlayQueue (Banshee.PlayQueue.PlayQueueSource) on org.bansheeproject.Banshee
[1 Debug 18:38:03.859] Extension source loaded: Fronta přehrávání
[1 Debug 18:38:03.910] Extension source loaded: Fronta souborového systému
[1 Debug 18:38:03.914] Starting GTK main loop
[1 Debug 18:38:04.089] Creating Pango.Layout, configuring Cairo.Context
[1 Debug 18:38:04.134] Creating Pango.Layout, configuring Cairo.Context
[1 Info  18:38:04.234] nereid Client Started
[1 Debug 18:38:04.236] Delayed Initializating Banshee.MediaEngine.PlayerEngineService
[1 Debug 18:38:04.253] (libbanshee:player) Audiosink has volume: YES
[1 Debug 18:38:04.258] (libbanshee:player) Using system (gst-plugins-good) equalizer element
[1 Debug 18:38:04.304] Player state change: NotReady -> Ready
[1 Debug 18:38:04.308] Loaded equalizer presets: 0,000202
[1 Debug 18:38:04.312] Selected equalizer: Rock
[1 Debug 18:38:04.317] Player state change: Ready -> Idle
[1 Debug 18:38:04.325] (libbanshee:player) Enabled ReplayGain
[1 Debug 18:38:04.330] (libbanshee:player) scaled volume: 1,00 (ReplayGain) * 0,00 (User) = 0,00
[1 Info  18:38:04.332] GStreamer version 0.10.35.0, gapless: False, replaygain: True
[1 Debug 18:38:04.333] Delayed Initializating Banshee.Dap.DapService
[1 Debug 18:38:04.339] Dap support extension loaded: Banshee.Dap.AppleDevice
[1 Debug 18:38:04.340] Dap support extension loaded: Banshee.Dap.Mtp
[1 Debug 18:38:04.341] Dap support extension loaded: Banshee.Dap.MassStorage
[1 Warn  18:38:04.342] Failed to load media-player-info file for 1
[1 Debug 18:38:04.346] Delayed Initializating Banshee.LibraryWatcher.LibraryWatcherService
[5 Info  18:38:04.357] AppleDeviceSource is ignoring unmounted volume Creative ZEN Mozaic
[1 Debug 18:38:04.369] Core service started (LibraryImportManager, 0,013638)
[1 Debug 18:38:04.384] Started LibraryWatcher for Hudba (/home/binturong/Multimedia/Hudba/)
[1 Debug 18:38:04.386] Started LibraryWatcher for Videa (/home/binturong/Multimedia/Hudba/)
Device 0 (VID=041e and PID=4161) is a Creative ZEN Mozaic.
[1 Debug 18:38:05.387] Finished - Startup Job
[1 Debug 18:38:05.390] Starting - Stahuje se přebal alba
[9 Debug 18:38:05.396] Finished - Stahuje se přebal alba
[1 Debug 18:38:12.093] Starting - Ukládají se metadata do souboru
[10 Debug 18:38:12.103] Finished - Ukládají se metadata do souboru
PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
inep: usb_get_endpoint_status(): Takové zařízení neexistuje
outep: usb_get_endpoint_status(): Takové zařízení neexistuje
usb_clear_halt() on IN endpoint: Takové zařízení neexistuje
usb_clear_halt() on OUT endpoint: Takové zařízení neexistuje
usb_clear_halt() on INTERRUPT endpoint: Takové zařízení neexistuje
ignoring usb_claim_interface = -9ignoring usb_claim_interface = -22LIBMTP PANIC: failed to open session on second attempt
[5 Debug 18:38:21.715] Failed to connect to mtp device. Trying 4 more times...
[1 Warn  18:38:21.727] Failed to load media-player-info file for 1
[5 Debug 18:38:24.047] Failed to connect to mtp device. Trying 3 more times...
[5 Debug 18:38:26.371] Failed to connect to mtp device. Trying 2 more times...
[5 Debug 18:38:28.371] Failed to connect to mtp device. Trying 1 more times...
[5 Debug 18:38:30.372] Failed to connect to mtp device. Trying 0 more times...
[5 Warn  18:38:32.431] Caught an exception - System.ArgumentNullException: Argument cannot be null. (in `mscorlib')
  at System.Int32.Parse (System.String s, NumberStyles style, IFormatProvider provider) [0x00000] in <filename unknown>:0 
  at System.Int32.Parse (System.String s, NumberStyles style) [0x00000] in <filename unknown>:0 
  at Banshee.Hardware.Gio.UsbDevice.GetVendorId (IUsbDevice device) [0x00000] in <filename unknown>:0 
  at Banshee.Hardware.Gio.UsbDevice.get_VendorId () [0x00000] in <filename unknown>:0 
  at Banshee.Dap.MassStorage.DeviceMapper.Map (Banshee.Dap.MassStorage.MassStorageSource source) [0x00000] in <filename unknown>:0 
  at Banshee.Dap.MassStorage.MassStorageSource.DeviceInitialize (IDevice device) [0x00000] in <filename unknown>:0 
  at Banshee.Dap.DapService.FindDeviceSource (IDevice device) [0x00000] in <filename unknown>:0 
[5 Info  18:38:32.433] AppleDeviceSource is ignoring unmounted volume System Reserved
[5 Info  18:38:32.437] AppleDeviceSource is ignoring unmounted volume Souborový systém 250 GB
[1 Warn  18:39:21.992] Failed to load media-player-info file for 1
Device 0 (VID=041e and PID=4161) is a Creative ZEN Mozaic.
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22[1 Warn  18:39:23.564] Failed to load media-player-info file for 1
LIBMTP PANIC: failed to open session on second attempt
[11 Debug 18:39:44.856] Failed to connect to mtp device. Trying 4 more times...
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
LIBMTP PANIC: Unable to read device information on device 10 on bus 2, trying to continue[11 Debug 18:39:50.632] Failed to connect to mtp device. Trying 3 more times...
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
LIBMTP PANIC: Unable to read device information on device 10 on bus 2, trying to continue[11 Debug 18:39:56.404] Failed to connect to mtp device. Trying 2 more times...
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
LIBMTP PANIC: Unable to read device information on device 10 on bus 2, trying to continue[11 Debug 18:40:02.176] Failed to connect to mtp device. Trying 1 more times...
ignoring usb_claim_interface = -16ignoring usb_claim_interface = -22PTP_ERROR_IO: failed to open session, trying again after resetting USB interface
LIBMTP libusb: Attempt to reset device
LIBMTP PANIC: Unable to read device information on device 10 on bus 2, trying to continue[11 Debug 18:40:07.949] Failed to connect to mtp device. Trying 0 more times...