Sporadic differences after a bootstrap

[Eli Zaretskii]

After bootstrapping with today's CVS, two files become different from
what's in CVS:

  Index: lisp/emacs-lisp/cl-loaddefs.el
  ===================================================================
  RCS file: /cvsroot/emacs/emacs/lisp/emacs-lisp/cl-loaddefs.el,v
  retrieving revision 1.25
  diff -u -r1.25 cl-loaddefs.el
  --- lisp/emacs-lisp/cl-loaddefs.el    7 Sep 2009 15:25:38 -0000       1.25
  +++ lisp/emacs-lisp/cl-loaddefs.el    11 Sep 2009 09:47:23 -0000
  @@ -282,7 +282,7 @@
   ;;;;;;  do-all-symbols do-symbols dotimes dolist do* do loop return-from
   ;;;;;;  return block etypecase typecase ecase case load-time-value
   ;;;;;;  eval-when destructuring-bind function* defmacro* defun* gentemp
  -;;;;;;  gensym) "cl-macs" "cl-macs.el" "51f6e3d56342c5e4434dbb7fda3b2e1c")
  +;;;;;;  gensym) "cl-macs" "cl-macs.el" "2aecc3d85778ca624e541d08032aa12a")
   ;;; Generated autoloads from cl-macs.el

   (autoload 'gensym "cl-macs" "\
  Index: lisp/mail/rmail.el
  ===================================================================
  RCS file: /cvsroot/emacs/emacs/lisp/mail/rmail.el,v
  retrieving revision 1.545
  diff -u -r1.545 rmail.el
  --- lisp/mail/rmail.el        10 Sep 2009 06:19:34 -0000      1.545
  +++ lisp/mail/rmail.el        11 Sep 2009 09:47:27 -0000
  @@ -4186,7 +4186,7 @@
   
   ;;;### (autoloads (rmail-next-labeled-message rmail-previous-labeled-message
   ;;;;;;  rmail-read-label rmail-kill-label rmail-add-label) "rmailkwd"
  -;;;;;;  "rmailkwd.el" "2a8211ddb881a6eeb44634909fecb6ee")
  +;;;;;;  "rmailkwd.el" "2e986921026eea971b49e91f53967f77")
   ;;; Generated autoloads from rmailkwd.el

   (autoload 'rmail-add-label "rmailkwd" "\

Why does this happen?  Is this a real problem?