tasque crashes when I connect to milk server

Binary package hint: tasque

When I bring up the "remember the milk" tab, and click on "Click Here to Connect", the application crashes.

Below you can see the output.

My office requires a proxy for outgoing web access, but:

(a) the application should not just die when it cannot open a web page

(b) I set the Gnome network proxy settings to be systemwide, so it should just work anyway.

[Debug]: Tasque remote control active.
[Debug]: Found Available Backend: Tasque.Backends.RtmBackend.RtmBackend
[Debug]: Found Available Backend: Tasque.Backends.Sqlite.SqliteBackend
[Debug]: Found Available Backend: Tasque.Backends.EDS.EDSBackend
[Debug]: Tasque.exe location: /usr/lib/tasque/Tasque.exe
[Info]: Searching for Backend DLLs in: /usr/lib/tasque
[Info]: Reading /usr/lib/tasque/RtmNet.dll
[Debug]: Storing 'Tasque.Backends.RtmBackend.RtmBackend' = 'Remember the Milk'
[Debug]: Storing 'Tasque.Backends.Sqlite.SqliteBackend' = 'Local File'
[Debug]: Storing 'Tasque.Backends.EDS.EDSBackend' = 'Evolution Data Server'
[Debug]: CurrentBackend specified in Preferences: Tasque.Backends.RtmBackend.RtmBackend
[Info]: Using backend: Remember the Milk (Tasque.Backends.RtmBackend.RtmBackend)
[Debug]: ThreadState: Unstarted
[Debug]: Backend sync finished
[Warn]: Cannot set status when taskWindow is null
[Debug]: Configuration status: False
[Info]: OnPreferences called
[Debug]: Loading preferences
[Debug]: Called Preferences Init
[Debug]: Rtm: Not authorized
[Debug]: Backend sync finished
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
RtmNet.RtmWebException: HTTP Error 400, Bad Request ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
  at System.Net.HttpWebRequest.CheckFinalStatus (System.Net.WebAsyncResult result) [0x00000]
  at System.Net.HttpWebRequest.SetResponseData (System.Net.WebConnectionData data) [0x00000] --- End of inner exception stack trace ---

  at RtmNet.Rtm.DoGetResponse (System.String url, System.String variables) [0x00000]
  at RtmNet.Rtm.GetResponse (System.Collections.Hashtable parameters) [0x00000]
  at RtmNet.Rtm.AuthGetFrob () [0x00000]
  at Tasque.Backends.RtmBackend.RtmBackend.GetAuthUrl () [0x00000]
  at Tasque.Backends.RtmBackend.RtmPreferencesWidget.OnAuthButtonClicked (System.Object sender, System.EventArgs args) [0x00000]
  at GLib.Signal.voidObjectCallback (IntPtr handle, IntPtr data) [0x00000]
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GLib.Signal.voidObjectCallback(IntPtr handle, IntPtr data)
   at GLib.Signal.voidObjectCallback(IntPtr , IntPtr )
   at Gtk.Application.gtk_main()
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Gnome.Program.Run()
   at Tasque.Application.StartMainLoop()
   at Tasque.Application.Main(System.String[] args)