[MonoDevelop] bug add reference in ubuntu 11.04

[Giacomo Stelluti Scala]

I've installed MonoDevelop 2.8 from badgerports.org.
I run Ubuntu Desktop 11.04 and when I try to add I reference to a project
(any MONO runtime, any PROJECT TYPE) I got:

System.Reflection.TargetInvocationException: Exception has been thrown by
the target of an invocation. ---> System.ArgumentException: There must be
2, 3 or 4 components in the version string.
  at System.Version..ctor (System.String version) [0x00000] in <filename
unknown>:0
  at MonoDevelop.Core.Assemblies.TargetFramework.IsCompatibleWithFramework
(MonoDevelop.Core.Assemblies.TargetFrameworkMoniker fxId) [0x00000] in
<filename unknown>:0
  at
MonoDevelop.Core.Assemblies.AssemblyContext+<GetPackages>c__Iterator2.MoveNext
() [0x00000] in <filename unknown>:0
  at
MonoDevelop.Core.Assemblies.AssemblyContext+<GetAssemblies>c__Iterator5.MoveNext
() [0x00000] in <filename unknown>:0
  at
MonoDevelop.Core.Assemblies.ComposedAssemblyContext+<GetAssemblies>c__IteratorB.MoveNext
() [0x00000] in <filename unknown>:0
  at
MonoDevelop.Core.Assemblies.ComposedAssemblyContext+<GetAssemblies>c__IteratorB.MoveNext
() [0x00000] in <filename unknown>:0
  at MonoDevelop.Ide.Projects.PackageReferencePanel.Reset () [0x00000] in
<filename unknown>:0
  at MonoDevelop.Ide.Projects.PackageReferencePanel.SetProject
(MonoDevelop.Projects.DotNetProject netProject) [0x00000] in <filename
unknown>:0
  at MonoDevelop.Ide.Projects.SelectReferenceDialog.SetProject
(MonoDevelop.Projects.DotNetProject configureProject) [0x00000] in
<filename unknown>:0
  at MonoDevelop.Ide.ProjectOperations.AddReferenceToProject
(MonoDevelop.Projects.DotNetProject project) [0x00000] in <filename
unknown>:0
  at
MonoDevelop.Ide.Gui.Pads.ProjectPad.ProjectReferenceFolderNodeCommandHandler.AddReferenceToProject
() [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 MonoDevelop.Components.Commands.DefaultCommandHandler.Run
(System.Object target, MonoDevelop.Components.Commands.Command cmd)
[0x00000] in <filename unknown>:0
  at MonoDevelop.Components.Commands.CustomCommandTargetAttribute.Run
(System.Object target, MonoDevelop.Components.Commands.Command cmd)
[0x00000] in <filename unknown>:0
  at
MonoDevelop.Ide.Gui.Components.NodeCommandHandler+TransactedNodeHandlerAttribute.Run
(System.Object target, MonoDevelop.Components.Commands.Command cmd)
[0x00000] in <filename unknown>:0
  at
MonoDevelop.Components.Commands.CustomCommandTargetAttribute.MonoDevelop.Components.Commands.ICommandTargetHandler.Run
(System.Object target, MonoDevelop.Components.Commands.Command cmd)
[0x00000] in <filename unknown>:0
  at MonoDevelop.Components.Commands.CommandHandlerInfo.Run (System.Object
cmdTarget, MonoDevelop.Components.Commands.Command cmd) [0x00000] in
<filename unknown>:0
  at
MonoDevelop.Components.Commands.CommandManager+<DispatchCommand>c__AnonStorey42.<>m__57
() [0x00000] in <filename unknown>:0
  at MonoDevelop.Components.Commands.CommandManager.DispatchCommand
(System.Object commandId, System.Object dataItem, System.Object
initialTarget, CommandSource source) [0x00000] in <filename unknown>:0

Anyone can help?

-- 
Giacomo Stelluti Scala
ICT Professional
http://gsscoder.blogspot.com/
http://commandline.codeplex.com/
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