The crash is produced when the gconf key /apps/banshee-1/interface/panes/albumartist/browser/top/position is set to 0.

When this key is set to 0, banshee will not start anymore.

To reproduce the bug:

1. drag the window separator to the most upper side possible.
2. Banshee will start consuming a lot of CPU, and should be killed.
3. After dragging the window it will show the output pasted below.
4. When you try to start banshee again, it will not start.

Please see the attached screenshot showing how to reproduce it.

** (Banshee:11270): WARNING **: Error calling get_info: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 702, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/platform/linux/dbus_interface.py", line 1041, in get_info
    return self.syncdaemon_folders.get_info(path)
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/interaction_interfaces.py", line 640, in get_info
    mdobj = self.fs.get_by_path(path.encode('utf-8'))
  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/filesystem_manager.py", line 781, in get_by_path
    mdid = self._idx_path[path]
KeyError: '/home/poliva/.ubuntuone/Purchased from Ubuntu One'


** (Banshee:11270): CRITICAL **: syncdaemon_folder_info_get_subscribed: assertion `SYNCDAEMON_IS_FOLDER_INFO (finfo)' failed

** (Banshee:11270): WARNING **: Error rescanning Purchased Music: No such file or directory
** (Banshee:11270): DEBUG: Loading the real store page
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.ArgumentException: Value does not fall within the expected range.
  at Hyena.Gui.Canvas.Rect.set_Height (Double value) [0x00000] in <filename unknown>:0 
  at Hyena.Gui.Canvas.Rect.op_Explicit (Rectangle rect) [0x00000] in <filename unknown>:0 
  at Hyena.Data.Gui.ListView`1[Banshee.Collection.AlbumInfo].OnSizeAllocated (Rectangle allocation) [0x00000] in <filename unknown>:0 
  at Gtk.Widget.sizeallocated_cb (IntPtr widget, IntPtr allocation) [0x00000] in <filename unknown>:0 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.Widget.sizeallocated_cb(IntPtr widget, IntPtr allocation)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Banshee.Gui.GtkBaseClient.Run()
   at Banshee.Gui.GtkBaseClient.Startup()
   at Hyena.Gui.CleanRoomStartup.Startup(Hyena.Gui.StartupInvocationHandler startup)
   at Banshee.Gui.GtkBaseClient.Startup()
   at Banshee.Gui.GtkBaseClient.Startup(System.String[] args)
   at Nereid.Client.Main(System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.AppDomain , System.Reflection.Assembly , System.String[] )
   at System.AppDomain.ExecuteAssemblyInternal(System.Reflection.Assembly a, System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.String assemblyFile, System.Security.Policy.Evidence assemblySecurity, System.String[] args)
   at System.AppDomain.ExecuteAssembly(System.String assemblyFile)
   at Booter.Booter.BootClient(System.String clientName)
   at Booter.Booter.Main()