I converted a Word document to a pdf. The document containing contains some equations. One of the equations uses square brackets covering 2 or three lines of text in height. Viewing the pdf in Acrobat 8.1 or Foxit Reader 4.0, it looks fine and prints fine. When viewing the pdf in Digital Editions v22.214.171.1242, it looks like the attached image. The horizontal line for the right hand bracket is not lined up properly. Is this a problem with the pdf or Digital Editions ? How to fix ?