diff on large file on checkin

Hi Clearcase team I discovered a bug. If I have a large file checked out (in my case 702754 bytes in 4349 lines), and I only make changes in the end of this file, (in my case the last two lines). emacs-cleartool tells me that there is no difference, and ask if I want to undo checkout, if say no (obviously) nothing happens. To check in this file I have two options change something in the top of the file or use another tool to check in with. thanks for this package, we are 30+ developers using it. Emacs: XEmacs 21.4 (patch 13) "Rational FORTRAN" [Lucid] (hppa2.0w-hp-hpux11.11) of Tue Jul 15 2003 on w72035 Package: clearcase.el </main/188> current state: ============== (setq system-type 'hpux system-configuration "hppa2.0w-hp-hpux11.11" emacs-version "21.4 (patch 13) \"Rational FORTRAN\" XEmacs Lucid" clearcase-clearcase-version-installed "ClearCase version 2002.05.00 (Tue Oct 30 09:18:29 EST 2001)\nclearcase_p2002.05.00-23 (Fri May 23 06:35:53 EDT 2003)\nclearcase_p2002.05.00-24 (Tue May 27 06:38:24 EDT 2003)\nmultisite_p2002.05.00-7 (Thu May 22 06:13:34 EDT 2003)\nclearcase_p2002.05.00-26 (Wed Aug 06 14:46:23 EDT 2003)\nmultisite_p2002.05.00-8 (Wed Aug 06 08:06:57 EDT 2003)\n＠(#) MVFS version 2002.05.00 (Wed Apr 9 10:44:33 EDT 2003)\ncleartool 2002.05.00 (Fri Oct 26 20:30:40 EDT 2001)\ndb_server 2002.05.00+ (Sun Jun 1 03:53:55 EDT 2003)\nVOB database schema version: 53\n" clearcase-cleartool-path "/usr/atria/bin/cleartool" clearcase-lt nil clearcase-v3 nil clearcase-v4 nil clearcase-v5 t clearcase-servers-online t clearcase-disable-tq nil clearcase-on-cygwin32 nil clearcase-setview-root "/view/mah__p400_devel" clearcase-suppress-vc-within-mvfs t shell-file-name "/usr/local/bin/zsh" )