> /usr/local/netscape/netscape: 1: Syntax error: "(" unexpected

They bumped the magic number.

Unique among shells, 'sh' assumes that if execve() on an executable file
returns ENOEXEC, then that file _must_ be an archaic shell script that
does not start with either ":" or "#!". ... So it sources it. (aiee!)

Try chmod +x on a JPG file, and try to run it. Every shell but 'sh' will
complain that it has a bad executable format or some such, but 'sh' will
happily route it to stdin and spew chunks of it back via error messages.

Todd Whitesel
toddpw @ best.com