title: Cannot see new files added to my git working directory
body: <p>git version 1.7.4.1</p>
  
  <p>I am using git on Ubuntu.</p>
  
  <p>I have copied some files from another directory to my git working directory. Normally would appear under <code>Untracked files</code>. However, they do not appear. So I cannot add them.</p>
  
  <p>When I do a <code>git status</code> the new files are not shown.</p>
  
  <p>I tried to add them by doing <code>git add source.c</code> then tried <code>git status</code>. The file was not show.</p>
  
  <p>So I opened the file and did a <code>save as</code> as the same name. git status still failed to see the file.</p>
  
  <p>I have done a <code>git ls-files</code> and the new files are shown ok.</p>
  
  <p>I have checked the file permissions and they are the same as all the current files in my git directory.</p>
  
  <p>I have never had this problem before.</p>
  
  <p>Many thanks for any suggestions,</p>