title: valid ics file is not a valid internet calendar file
body: <p>I've written a php script which produces an ics file output:</p>
  
  <blockquote>
    <p>BEGIN:VCALENDAR<br> PRODID:-//hacksw/handcal//NONSGML v1.0//EN<br>
    VERSION:2.0<br> BEGIN:VEVENT<br> DTSTAMP:20120801T000000Z<br>
    DTSTART:20120801T000000Z<br> DTEND:20120801T000000Z<br>
    SUMMARY:test<br> ORGANIZER:Me<br> UID:Me<br> END:VEVENT<br>
    END:VCALENDAR<br></p>
  </blockquote>
  
  <p>The file is shown to be valid when using the online validator:</p>
  
  <p><a href="http://severinghaus.org/projects/icv/" rel="nofollow">http://severinghaus.org/projects/icv/</a></p>
  
  <p>Now here's the strange thing.... If I opt to open the file as it is generated by the php I get the MS Outlook error message  is not a valid internet calendar file. But, if I open it from the folder it's created in, it gets imported without trouble.</p>
  
  <p>Does anyone have any ideas?</p>