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I find that multihop methods are not working since upgrading to CVS
from 22.  Below is an example using a one-hop multi-hop procedure
which works with Emacs 22.  It seems clear that "Tramp: Sending
command ` && exit || exit'" is wrong.

twb@Clio[Desktop]$ sudo -l
User twb may run the following commands on this host:
    (ALL) NOPASSWD: ALL
twb@Clio[Desktop]$ emacs -batch -Q -nw -eval '(load "tramp.el")' -f toggle-debug-on-error /sudo::/
Loading /usr/share/emacs/23.0.50/lisp/net/tramp.el.gz...
uncompressing tramp.el.gz...
uncompressing tramp.el.gz...done
Debug on Error enabled globally
Tramp: Opening connection for root@Clio.twb.ath.cx using sudo...
Tramp: Waiting 60s for local shell to come up...
Tramp: Sending command `sudo -u root -s -p Password: && exit || exit'
Tramp: Waiting for prompts from remote shell
Tramp: Found remote shell prompt on `Clio.twb.ath.cx'
twb@Clio[Desktop]$ emacs -batch -Q -nw -eval '(load "tramp.el")' -f toggle-debug-on-error /multi:sudo:root@127.0.0.1:/
Loading /usr/share/emacs/23.0.50/lisp/net/tramp.el.gz...
uncompressing tramp.el.gz...
uncompressing tramp.el.gz...done
Debug on Error enabled globally
Tramp: Opening connection for sudo using multi...
Tramp: Waiting 60s for local shell to come up...
Tramp: Sending command `  && exit || exit'
Tramp: Waiting for prompts from remote shell
Tramp: Found remote shell prompt on `sudo'
File error: Process has died
...
  (progn (setq value (progn ... ...)) (tramp-set-connection-property v uname value))
  (if (eq value (quote undef)) (progn (setq value ...) (tramp-set-connection-property v uname value)))
  (when (eq value (quote undef)) (setq value (progn ... ...)) (tramp-set-connection-property v uname value))
  (let ((value ...)) (when (eq value ...) (setq value ...) (tramp-set-connection-property v uname value)) value)
  (with-connection-property v uname (tramp-send-command v (format "cd %s; pwd" uname)) (with-current-buffer (tramp-get-buffer v) (goto-char ...) (buffer-substring ... ...)))
  (setq uname (with-connection-property v uname (tramp-send-command v ...) (with-current-buffer ... ... ...)))
  (let ((uname ...) (fname ...)) (when (and ... ...) (setq uname ...)) (setq uname (with-connection-property v uname ... ...)) (setq localname (concat uname fname)))
  (progn (let (... ...) (when ... ...) (setq uname ...) (setq localname ...)))
  (if (string-match "\\`\\(~[^/]*\\)\\(.*\\)\\'" localname) (progn (let ... ... ... ...)))
  (when (string-match "\\`\\(~[^/]*\\)\\(.*\\)\\'" localname) (let (... ...) (when ... ...) (setq uname ...) (setq localname ...)))
  (let* ((v ...) (method ...) (user ...) (host ...) (localname ...)) (unless (file-name-absolute-p localname) (setq localname ...)) (when (string-match "\\`\\(~[^/]*\\)\\(.*\\)\\'" localname) (let ... ... ... ...)) (while (string-match "//" localname) (setq localname ...)) (tramp-let-maybe directory-sep-char 47 (let ... ...)))
  (with-parsed-tramp-file-name name nil (unless (file-name-absolute-p localname) (setq localname ...)) (when (string-match "\\`\\(~[^/]*\\)\\(.*\\)\\'" localname) (let ... ... ... ...)) (while (string-match "//" localname) (setq localname ...)) (tramp-let-maybe directory-sep-char 47 (let ... ...)))
  (if (not (tramp-tramp-file-p name)) (tramp-run-real-handler (quote expand-file-name) (list name nil)) (with-parsed-tramp-file-name name nil (unless ... ...) (when ... ...) (while ... ...) (tramp-let-maybe directory-sep-char 47 ...)))
  tramp-handle-expand-file-name("/multi:sudo:root@127.0.0.1:/" "~/Desktop/")
  apply(tramp-handle-expand-file-name ("/multi:sudo:root@127.0.0.1:/" "~/Desktop/"))
  (if fn (apply (cdr fn) args) (tramp-run-real-handler operation args))
  (let ((fn ...)) (if fn (apply ... args) (tramp-run-real-handler operation args)))
  (progn (let (...) (if fn ... ...)))
  (unwind-protect (progn (let ... ...)) (set-match-data save-match-data-internal (quote evaporate)))
  (let ((save-match-data-internal ...)) (unwind-protect (progn ...) (set-match-data save-match-data-internal ...)))
  (save-match-data (let (...) (if fn ... ...)))
  (let ((tramp-locker t)) (save-match-data (let ... ...)))
  (progn (setq tramp-locked t) (let (...) (save-match-data ...)))
  (unwind-protect (progn (setq tramp-locked t) (let ... ...)) (setq tramp-locked tl))
  (let ((tl tramp-locked)) (unwind-protect (progn ... ...) (setq tramp-locked tl)))
  tramp-sh-file-name-handler(expand-file-name "/multi:sudo:root@127.0.0.1:/" "~/Desktop/")
  apply(tramp-sh-file-name-handler expand-file-name ("/multi:sudo:root@127.0.0.1:/" "~/Desktop/"))
  (cond ((and completion ... ...) t) ((and completion ... ...) filename) (foreign (apply foreign operation args)) (t (tramp-run-real-handler operation args)))
  (let* ((v ...) (method ...) (user ...) (host ...) (localname ...)) (cond (... t) (... filename) (foreign ...) (t ...)))
  (with-parsed-tramp-file-name filename nil (cond (... t) (... filename) (foreign ...) (t ...)))
  (let* ((filename ...) (completion ...) (foreign ...)) (with-parsed-tramp-file-name filename nil (cond ... ... ... ...)))
  (progn (let* (... ... ...) (with-parsed-tramp-file-name filename nil ...)))
  (unwind-protect (progn (let* ... ...)) (set-match-data save-match-data-internal (quote evaporate)))
  (let ((save-match-data-internal ...)) (unwind-protect (progn ...) (set-match-data save-match-data-internal ...)))
  (save-match-data (let* (... ... ...) (with-parsed-tramp-file-name filename nil ...)))
  tramp-file-name-handler(expand-file-name "/multi:sudo:root@127.0.0.1:/" "~/Desktop/")
  expand-file-name("/multi:sudo:root@127.0.0.1:/" "~/Desktop/")
  command-line-1(("-eval" "(load \"tramp.el\")" "-f" "toggle-debug-on-error" "/multi:sudo:root@127.0.0.1:/"))
  command-line()
  normal-top-level()





In GNU Emacs 23.0.50.1 (i486-pc-linux-gnu, GTK+ Version 2.12.5)
 of 2008-01-21 on elegiac, modified by Debian
 (emacs-snapshot package, version 1:20080120-1)
configured using `configure  '--build' 'i486-linux-gnu' '--host' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/23.0.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.0.50/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.0.50/leim' '--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_AU.utf8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Post

Minor modes in effect:
  xterm-mouse-mode: t
  savehist-mode: t
  shell-dirtrack-mode: t
  icomplete-mode: t
  partial-completion-mode: t
  show-paren-mode: t
  delete-selection-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
ESC < ESC > ESC x r e p o r t SPC e m a c s RET

Recent messages:
Loading /etc/emacs/site-start.d/51debian-el.el (source)...done
Source file `/usr/share/emacs/23.0.50/lisp/ido.el' newer than byte-compiled file
Loading subst-ksc...done
Loading subst-gb2312...done
Loading subst-big5...done
Loading subst-jis...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Modification-flag cleared
When done with a buffer, type C-x #
Mark set [2 times]