1 - EBP and ESP are sometimes corrupted while running 16-bit code.
2 - Dialog Boxes created by WM_CREATE handler aren't visible
3 - RegisterClass() with hbrBackground = COLOR_APPWORKSPACE+1 does not work.
4 - MDI does not send WM_GETMINMAX message.
5 - InitializeLoadedDLLs() can't init LZEXPAND.DLL. (cs:ip => 0:0)
6 - LoadCursor does not correctly handle bitmap cursors
7 - AllocCSToDSAlias() shouldn't alloc alias for the same segment multiple times.
8 - Dialogs don't support resources which are referred to as integers.