title: Google Calendar errors on importing .ics file
body: <p>I'm having a hard time getting my subscription calendar to work with Google Calendar.  The following URL works correctly with Outlook and Apple Calendar (iCal), but I get an error from Google - "The address that you provided did not contain a calendar in a valid iCal or GData format."  </p>
  
  <p>My URL passes validation on the following validators (icalvalid.cloudapp.net/ and severinghaus.org/projects/icv/)</p>
  
  <p>Can anyone provide any idea what is wrong?  Here is the URL:
  <a href="https://beta.vcallboard.com/calls/exportcalendar.php?userID=Mg%3D%3D&amp;token=MjB6N2E0OTk%3D" rel="nofollow">https://beta.vcallboard.com/calls/exportcalendar.php?userID=Mg%3D%3D&amp;token=MjB6N2E0OTk%3D</a></p>
  
  <p>Theories I've already tried:
   - doesn't work over https - (I saved and uploaded the .ics file as a file in my server root and that URL worked - seems it has something to do with the auto-generation)
   - blank values for some fields aren't valid (it works if I upload it as a .ics file)</p>