SlickRick has uploaded a patch.
Description:
In order to "improve" prism interop when a WPF application/form is called inside Windows.Forms or VB6, our company did the following modifications that we want to share in case it is found useful for future release, individual or if someone sees a big potential problem with the change.
See this discussion for more information:
https://compositewpf.codeplex.com/discussions/246195