title: Saving docx as a filtered HTML flattens some images to a height of 1
body: <p>I've inherited a build system that uses chmProcessor to convert a docx file to a chm file.  Not ideal obviously, and I plan to replace it in the future, but for the immediate future I'm stuck with it.</p>
  <p>chmProcessor starts by using Word to resave the docx as a filtered html file.  In the file there's a warning icon that's used extensively.  For some reason when converting the file to html this icon is changed to have a height of 1 about halfway through.  In the html it's explicitly given a height of 1 pixel, and it's also saving a second copy of the image that is only 1 pixel high.</p>
  <p>I've tried replacing it at that point with a different identical image and a completely different image to no effect.  I've even converted it into html, updated the html to use the correct image with the correct height and converted it back into a docx.  When I convert it into html again the image is flattened again.</p>
  <p>Deleting different sections of the document only moves the problem later in the file, and it doesn't seem to matter which bits I delete.</p>
  <p>There's obviously some subtlety in the docx that is causing this but I honestly have no idea what.  Any thoughts?</p>