Updated to 4.3 and got a new error

Anyone have any idea what this error is? I don’t get a call stack or anything like that.
ms_IDToPointer->find (obj->GetInstanceID ()) == ms_IDToPointer->end ()

\

I keep getting it too. I am guessing either a Substance or Mecanim thing…but I hope someone chimes in. It doesn’t seem to be fatal but still./ I like a constantly clean console with no warnings or errors.