I've been using the MFC emulator (v2.0.0) for a few days now, and I just now found a bug I've never seen before. I started the emulator by selecting a game from the Windows 7 recent files Jump List, and right after the window displayed, it showed this error in a message box 3 times:
Internal error : (CAccelsOb::GetString) m_wKey invalid
It also shows this error whenever I try to access the File menu (the File menu doesn't show; the other menus are fine) or use the Pause command (the game still pauses after the error message, though). I started another two instances using the same method (with two different games) and they did not show these symptoms.
mfc isn't really going to revieve any real new bug fixes, it's being replaced with the wxwidgets based interface.