diff -ruN /usr/share/emacs/site-lisp/vc-git.el /home/evg/.emacs.d/vc-git.el
--- /usr/share/emacs/site-lisp/vc-git.el	2008-07-10 01:10:40 +0800
+++ /home/evg/.emacs.d/vc-git.el	2008-09-18 00:15:17 +0800
@@ -164,6 +164,7 @@
 
 (defun vc-git-register (file &optional rev comment)
   "Register FILE into the git version-control system."
+  (if comment (message "Note: your comment will be lost, cause git does not support comments for adding files."))
   (vc-git--run-command file "update-index" "--add" "--"))
 
 (defun vc-git-print-log (file &optional buffer)