folder naming bug?

git isn’t tracking folder renames when the case of the letters change, but it will track it if the folder changes names.  Is this intentional?

Here is an example:

08:51:26 ~/test $ git init
Initialized empty Git repository in /Users/kcoleman/test/.git/
08:51:29 ~/test (master #) $ mkdir main
08:51:44 ~/test (master #) $ cd main
08:51:46 ~/test/main (master #) $ touch readme.md
08:51:50 ~/test/main (master #) $ ls
readme.md
08:51:53 ~/test/main (master #) $ cd ..
08:51:54 ~/test (master #) $ git add .
08:51:59 ~/test (master #) $ git commit -m "one"
[master (root-commit) b0fddf6] one
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 main/readme.md
08:52:04 ~/test (master) $ cd main
08:52:14 ~/test/main (master) $ cd ..
08:52:27 ~/test (master) $ mv main Main
08:53:51 ~/test (master) $ git status
On branch master
nothing to commit, working directory clean
08:53:53 ~/test (master) $ ls
Main
08:54:02 ~/test (master) $ mv Main MainA
08:55:44 ~/test (master *) $ git status
On branch master
Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

	deleted:    main/readme.md

Untracked files:
  (use "git add <file>..." to include in what will be committed)

	MainA/

no changes added to commit (use "git add" and/or "git commit -a") 08:55:45 ~/test (master *) $