Found this issue on a project, tested against the electron-quick-start and found the problem still exists.

Simply adding "frame: false" to the new BrowserWindow() call will cause it.
- Electron version: 0.37.5
- Operating system: Windows

![capture](https://cloud.githubusercontent.com/assets/5051169/14453254/a38c177c-008b-11e6-9e80-97c6a95c816e.PNG)

atom/browser/native_window.cc
if (!inspectable_web_contents_)
    return;
  inspectable_web_contents_->GetView()->SetDelegate(nullptr);
  inspectable_web_contents_ = nullptr;
  Observe(nullptr);
  
  
  
  
  
  CloseImmediately();
  
  window_unresposive_closure_.Cancel();
}
void NativeWindow::RendererUnresponsive(content::WebContents* source) {