Description of problem:

monodevelop crash when open a project via "File -> Open"
while open the same project file via the Welcomepage works fine.

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

monodevelop-0.13.1-1.fc7

How reproducible:

Always

Steps to Reproduce:
1. start monodevelop
2. create a new c#,gtk2# project
3. save or close it, than reopen it via File -> Open

Actual results:

monodevelop crashed

Expected results:

monodevelop open the project file

Additional info:

==> ~/.xsession-errors <==
Error: did not find one of the files in sources//usr/lib/monodoc/sources/monoapi

Exception iGtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle
the exception.
GLib.MissingIntPtrCtorException: GLib.Object subclass
MonoDevelop.Ide.Gui.Dialogs.FileSelectorDialog must provide a protected or
public IntPtr ctor to support wrapping of native object handles.
  at GLib.ObjectManager.CreateObject (IntPtr raw) [0x00000] 
  at GLib.Object.GetObject (IntPtr o, Boolean owned_ref) [0x00000] 
  at GLib.ListBase.DataMarshal (IntPtr data) [0x00000] 
  at GLib.ListBase+ListEnumerator.get_Current () [0x00000] 
  at GLib.ListBase.CopyTo (System.Array array, Int32 index) [0x00000] 
  at GLib.Marshaller.ListToArray (GLib.ListBase list, System.Type type) [0x00000] 
  at Gtk.Window.ListToplevels () [0x00000] 
  at MonoDevelop.Components.Commands.CommandManager.GetActiveWidget (Gtk.Window
win) [0x00000] 
  at MonoDevelop.Components.Commands.CommandManager.UpdateToolbars () [0x00000] 
  at MonoDevelop.Components.Commands.CommandManager.UpdateStatus () [0x00000] 
  at GLib.Timeout+TimeoutProxy.Handler () [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean
is_terminal)
   at GLib.Timeout+TimeoutProxy.Handler()
   at GLib.Timeout+TimeoutProxy.Handler()
   at Gtk.Application.gtk_main()
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at MonoDevelop.Ide.Gui.IdeApp.Run()
   at MonoDevelop.Ide.Gui.IdeStartup.Run(System.String[] args)
   at MonoDevelop.Core.AddIns.AddInService.StartApplication(System.String
addinId, System.String[] parameters)
   at MonoDevelop.Startup.SharpDevelopMain.Main(System.String[] args)