Possible git status problem at case insensitive file system

All:
        I use msysgit 1.7.0.2 at windows xp.
        Problem: git status will list tracked directory as untracked dir.
        Duplicate:
        1. mkdir test, cd test
        2. git init-db
        3. mkdir d, cd d
        4. touch a.c
        5. git add a.c
        6. git commit -a -m "test"
        7. cd ..
        8.  mv d d1
        9.  mv d1 D
       10. git status


# On branch master
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#       D/
nothing added to commit but untracked files present (use "git add" to track)

        D/ should be same as d/ at case insensitive file system.
        D/ should not listed by git status.

best regards
Frank Li