Description of problem:
If you install gnome-do, it is missing a dependency for gnome-desktop. Without the dependency, you get messages like the following, and as soon as you try to access the Preferences dialog, gnome-do crashes:

[Error 11:12:22.722] Could not load desktop item: libgnome-desktop-2.so.17
[Error 11:12:22.722] Could not load desktop item: libgnome-desktop-2.so.17
Marshaling activate signal
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.DllNotFoundException: libgnome-desktop-2.so.17
  at (wrapper managed-to-native) Gnome.DesktopItem:gnome_desktop_item_new_from_uri (intptr,int,intptr&)
  at Gnome.DesktopItem.NewFromUri (System.String uri, DesktopItemLoadFlags flags) [0x00000] in <filename unknown>:0 
  at Do.Platform.Linux.SystemService.get_AutoStartFile () [0x00000] in <filename unknown>:0 
  at Do.Platform.Linux.SystemService.IsAutoStartEnabled () [0x00000] in <filename unknown>:0 
  at Do.UI.GeneralPreferencesWidget.get_AutostartEnabled () [0x00000] in <filename unknown>:0 
  at Do.UI.GeneralPreferencesWidget..ctor () [0x00000] in <filename unknown>:0 
  at Do.UI.PreferencesWindow..ctor () [0x00000] in <filename unknown>:0 
  at Do.Core.Controller.ShowPreferences () [0x00000] in <filename unknown>:0 
  at Do.Universe.PreferencesItem.Run () [0x00000] in <filename unknown>:0 
  at Do.UI.MainMenu+<MenuItemFromRunnableItem>c__AnonStorey12.<>m__2B (System.Object sender, System.EventArgs e) [0x00000] in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.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.MonoMethod.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.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <filename unknown>:0 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <filename unknown>:0 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] in <filename unknown>:0 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GLib.SignalClosure.MarshalCallback(IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Do.Do.Main(System.String[] args)




Version-Release number of selected component (if applicable):


How reproducible:
Every time

Steps to Reproduce:
1. Install Fedora 15.
2. Make sure gnome-desktop is not installed.
3. yum install gnome-do
  
Actual results:
Error above

Expected results:
Preferences dialog

Additional info:

Workaround:
yum install gnome-desktop