Unity 3 - error after project upgrading

Hello,

I’ve upgraded my project and all seem to be working fine, however I’m getting this editor error almost all the time:

!IsActive ()  !m_RunInEditMode

(Filename: ..\..\Runtime\Mono\MonoBehaviour.cpp Line: 470)

It’s thrown when I for example click to browse textures. It didn’t happen when I had the Unity 3 Example Project opened, though. Is it possible that it’s caused by some older editor component scripts?

Me same problem.