I found another "Internal error" message.

--------------------
import std.stream; /* for stdin */
import std.file;   /* stdin is a File object */

extern (C) int system (char *);

void main()
{
   printf("I'm waiting for you to press another key...\n\0");
   stdin.getch();
}
--------------------

The resulting error is:
Internal error: ..\ztc\cod1.c 2240

Maybe getch() isn't a valid property for stdin, but the compiler should at least specify the problem.

(By the way, I realize I can use getch() from std.c.stdio for the same purpose, I just thought this was an obscure error that may cause more serious problems elsewhere.)

-- 
Justin
http://jcc_7.tripod.com/d/