GUILayout: Mismatched LayoutGroup.Repaint

[tman1978]

I am consistently getting the error shown below. It first started when I began having the FSM Browser window shown all of the time. I'm using PlayMaker 1.7.7.2, Unity 4.5.1.

ArgumentException: GUILayout: Mismatched LayoutGroup.Repaint
UnityEngine.GUILayoutUtility.BeginLayoutGroup (UnityEngine.GUIStyle style, UnityEngine.GUILayoutOption[] options, System.Type LayoutType) (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/GUILayoutUtility.cs:210)
UnityEngine.GUILayout.BeginHorizontal (UnityEngine.GUIContent content, UnityEngine.GUIStyle style, UnityEngine.GUILayoutOption[] options) (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/GUILayout.cs:235)
UnityEngine.GUILayout.BeginHorizontal (UnityEngine.GUILayoutOption[] options) (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/GUILayout.cs:227)
HutongGames.PlayMakerEditor.FsmSelector.DoTableRow (HutongGames.PlayMaker.Fsm fsm)
HutongGames.PlayMakerEditor.FsmSelector.DoGUI ()
HutongGames.PlayMakerEditor.BaseEditorWindow.OnGUI ()
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)

[Alex Chouls]

When do you get the error? On Playmode change? Recompile? Selecting an FSM...?
Knowing when it happens will help us reproduce and fix it...

[tman1978]

So far it happens when Play Mode exits. I tried reproducing in a new empty project but have been unable to do so.