[MonoDevelop] Problem to start on Ubuntu Jaunty after updating from Intrepid

[Pepito]

Hello,

I've a problem to start MonoDevelop on Ubuntu Jaunty after updating from 
Intrepid. I've this message :
Error while updating status of command: ShowDisassembly.
System.InvalidOperationException: Could not read add-in description
  at Mono.Addins.Addin.get_Description () [0x00000]
  at Mono.Addins.AddinSessionService.CheckHostAssembly 
(System.Reflection.Assembly asm) [0x00000]
  at Mono.Addins.AddinSessionService.OnAssemblyLoaded (System.Object s, 
System.AssemblyLoadEventArgs a) [0x00000]
  at System.AppDomain.DoAssemblyLoad (System.Reflection.Assembly 
assembly) [0x00000]
  at MonoDevelop.Components.Commands.ActionCommand.UpdateCommandInfo 
(MonoDevelop.Components.Commands.CommandInfo info) [0x00000]
  at MonoDevelop.Components.Commands.CommandManager.GetCommandInfo 
(System.Object commandId, System.Object initialTarget) [0x00000]

Can somebody help me?

Thanks.

Pepito