title: Netbeans build-impl.xml error
body: <p>I was developing a project on netbeans 6.8 and everything was fine, but a week ago, I installed netbeans 7.0 just for a try.</p>
  
  <p>When i opened nb 7.0 my project was listed in 7.0 as well.</p>
  
  <p>Now today, I am trying to compile my project on netbeans 6.8 and it gives me this error.</p>
  
  <blockquote>
    <p>nbproject\build-impl.xml:517: copylibs doesn't support the "indexMetaInf" attribute</p>
  </blockquote>
  
  <p>I guess netbeans 7.0 changed the file.
  How can i fix this problem?</p>