title: git conflict with differently cased directory name
body: <p>I am using msysgit 1.8.1, and I am running into an issue with directory casing.  I have the core.ignorecase set to true.  But I have a case where git seems to have the folder under two different casings.  So when I do a git add -A, it picks up the change to a particular file under the path</p>
  
  <p>tools\TALRGB\TalRgb.vcxproj</p>
  
  <p>but the path</p>
  
  <p>TOOLS\TALRGB\TalRgb.vcxproj</p>
  
  <p>always shows as an untracked change.  This doesn't seem to cause any problems, but it will be an issue if I roll this out to other developers.  How can I get git to not do this?</p>
  
  <p>This question is related to <a href="https://stackoverflow.com/questions/15687142/git-add-will-not-stage-certain-files">git add will not stage certain files</a></p>