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pinta Unhandled exception:

Bonjour.

Je sèche sur un souci avec pinta que je viens d'installer sur ubuntu 14.04.

Dès que j’essaye de faire la moindre correction sur une photo (corrections d'yeux rouges, réglage de luminosité, etc..., n'importe quelle manip, en fait), j'ai un message d’erreur .

"Unhandled exception:
Exception has been thrown by the target of an invocation

avec les détails

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: LivePreviewManager.Start() called while live preview is already enabled.
  at Pinta.Core.LivePreviewManager.Start (Pinta.Core.BaseEffect effect) [0x00000] in <filename unknown>:0 
  at Pinta.Core.EffectsManager+<RegisterEffect>c__AnonStorey1.<>m__0 (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 

Mouaiiiiis... "LivePreviewManager.Start() called while live preview is already enabled" çà me parle pas trop. J'ai installé classiquement via la logithèque... Quelqu'un aurait une idée? Merci d'avance.