kiki@kiki-U52F:~$ banshee --debug
** Running Mono with --debug   **
[1 Info  01:55:37.115] Running Banshee 2.0.0: [Ubuntu Natty (development branch) (linux-gnu, i686) @ 2011-04-18 16:21:33 UTC]
[1 Debug 01:55:37.130] Initializing GTK
Exception has been thrown by the target of an invocation.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: Could not read add-in description
  at Mono.Addins.Addin.get_Description () [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.InternalGetInstalledAddins (System.String domain, System.String idFilter, AddinSearchFlagsInternal type) [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.InternalGetInstalledAddins (System.String domain, AddinSearchFlagsInternal type) [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.Update (IProgressStatus monitor, System.String domain) [0x00000] in <filename unknown>:0 
  at Mono.Addins.Database.AddinDatabase.Repair (IProgressStatus monitor, System.String domain) [0x00000] in <filename unknown>:0 
  at Mono.Addins.AddinRegistry.Rebuild (IProgressStatus monitor) [0x00000] in <filename unknown>:0 
  at Banshee.ServiceStack.ServiceManager.InitializeAddins () [0x00075] in /build/buildd/banshee-2.0.0/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs:86 
  at Banshee.ServiceStack.ServiceManager.DefaultInitialize () [0x00005] in /build/buildd/banshee-2.0.0/src/Core/Banshee.Services/Banshee.ServiceStack/ServiceManager.cs:119 
  at Banshee.ServiceStack.Application.Initialize () [0x00000] in /build/buildd/banshee-2.0.0/src/Core/Banshee.Services/Banshee.ServiceStack/Application.cs:80 
  at Banshee.Gui.GtkBaseClient.Initialize (Boolean registerCommonServices) [0x00010] in /build/buildd/banshee-2.0.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:143 
  at Banshee.Gui.GtkBaseClient..ctor (Boolean initializeDefault, System.String defaultIconName) [0x00013] in /build/buildd/banshee-2.0.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:95 
  at Banshee.Gui.GtkBaseClient..ctor () [0x00000] in <filename unknown>:0 
  at Nereid.Client..ctor () [0x00000] in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoCMethod:InternalInvoke (object,object[],System.Exception&)
  at System.Reflection.MonoCMethod.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.MonoCMethod.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.MonoCMethod.Invoke (BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0 
  at System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] in <filename unknown>:0 
  at System.Activator.CreateInstance (System.Type type) [0x00000] in <filename unknown>:0 
  at Banshee.Gui.GtkBaseClient.Startup () [0x00000] in /build/buildd/banshee-2.0.0/src/Core/Banshee.ThickClient/Banshee.Gui/GtkBaseClient.cs:82 
  at Hyena.Gui.CleanRoomStartup.Startup (Hyena.Gui.StartupInvocationHandler startup) [0x00044] in /build/buildd/banshee-2.0.0/src/Hyena/Hyena.Gui/Hyena.Gui/CleanRoomStartup.cs:54 
kiki@kiki-U52F:~$ banshee -d
[Info  01:55:58.012] Running Banshee 2.0.0: [Ubuntu Natty (development branch) (linux-gnu, i686) @ 2011-04-18 16:21:33 UTC]
[Info  01:55:59.658] Updating web proxy from GConf
[Info  01:55:59.697] All services are started 0.845719
** (Banshee:5280): DEBUG: SyncDaemon already running, initializing SyncdaemonDaemon object

(Banshee:5280): libsoup-WARNING **: No feature manager for feature of type 'U1RequestChrome'

** (Banshee:5280): 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/kiki/.ubuntuone/Purchased from Ubuntu One'


** (Banshee:5280): CRITICAL **: syncdaemon_folder_info_get_subscribed: assertion `SYNCDAEMON_IS_FOLDER_INFO (finfo)' failed

** (Banshee:5280): WARNING **: Error rescanning Purchased Music: No such file or directory
** (Banshee:5280): DEBUG: Loading the real store page
[Info  01:56:00.994] nereid Client Started
[Info  01:56:01.060] GStreamer version 0.10.32.0, gapless: True, replaygain: False
The program 'Banshee' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadDrawable (invalid Pixmap or Window parameter)'.
  (Details: serial 13736 error_code 9 request_code 137 minor_code 9)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

Sorry, I don't know if this will be of any help. Hopefully you guys can figure this out cause I really like clutterflow :)