C-k C-k in GNU Emacs doesn't copy the end of line

[Steinar Bang]

Platform: GNU Emacs 21.2.1 on RH8 (vanilla RH8 Emacs)
	  Cygwin XFree86-xserv 4.3.0-21
	  Win2k
	  Norwegian keyboard (autodetected by the X server)

When GNU Emacs from RH8 is displaying on Cygwin/XFree86, and I do the
command C-k C-k to get a line into the kill buffer, and then C-y to
get it back again, the end of line is lost.

When displaying natively on the RH8 X server, the command works as
expected.