!dest.m_MultiFrameGUIState.m_NamedKeyControlList Error

Getting this error (which I’ve gotten multiple times even on past stable releases):

!dest.m_MultiFrameGUIState.m_NamedKeyControlList

And it’s happening every time I click in my game view or when I play the game in the editor and use any GUI functionality (type in an input field, for example).

It hasn’t broken anything as far as I can tell, but anyone know what causes that?

Experiencing the same here on a MAC. Was working fine and then suddenly this started showing up.

Using the new Unity UI on 4.6.1.

Thanks for any help !