title: Flex: Error #2038: File I/O Error
body: <p>I have a flex app doing multiple file upload, and keep getting this error:
  Error #2038: File I/O Error</p>
  
  <p>Flex gives this error, yet it seems to work because the upload does get processed.
  This was happening intermittently, now on every attempt. Any ideas on what might be going on here? I've checked that permissions are read/write, google'd something about a trailing slash issue with the url. I'm at a loss as to what could be going on.</p>