Try the next thing in Artworks:
Open Main menu. Go with to File>Export. Open Draw or Artworks EPS save box. Go back with pointer to main menu (keep menus open) and try to open the submenu Objects, Lines/shapes, View or Utilities. I then get the error: parent item index outside parent menu.
Another thing only with Risc OS Adjust (4.39): When running Artworks, go back to a 16 colour (4 bits) mode or less and select the textline tool. Try to type in a text. I get that all characters are place upon each other. When I use a textarea I can't type any chars at all. Under RISC OS 4.02 everything works fine.
Then some other undocumented feature when using Artworks in a 16 colour (16 grey levels works fine) mode. When you activate the transparency all colour in the document are not displayed correctly. Exporting to 16 colours with transparency works just fine.
All test were done with Virtual RPC.