- EBP and ESP are sometimes corrupted while running 16-bit code.
- Dialog Boxes created by WM_CREATE handler aren't visible
- RegisterClass() with hbrBackground = COLOR_APPWORKSPACE+1 does not work.
- MDI does not send WM_GETMINMAX message.
- InitializeLoadedDLLs() can't init LZEXPAND.DLL. (cs:ip => 0:0)