title: Pdftron message header not found when opening a file with extension capitalized(DOCX)
body: <p>In a windows 8.1 universal app, When opening a file with extension capitalized(eg : DOCX) we get a error "Pdftron message header not found". i.e. during initializing PDFDoc class in pdftron.PDF library. But this  works fine for pdf extension capitalized(PDF). This issue does not occur in Android libraries.</p>
  
  <p>We tried instantiating PDFDoc class by passing file as different contents as available in the PDFDoc construtors i.e IStorageFile, IRandomAccessStream, IInputStream, IBuffer, byte[].</p>
  
  <p>Any quick help appreciated.</p>
  
  <p>Thanks in Advance!</p>