[`http://www.ei.ruhr-uni-bochum.de/media/crypto/veroeffentlichungen/2010/08/08/baileypaaroefjc.pdf`](http://www.ei.ruhr-uni-bochum.de/media/crypto/veroeffentlichungen/2010/08/08/baileypaaroefjc.pdf) is severely mis-rendered by the version of pdf.js bundled with Firefox 38.0.5:

![screen shot of misrendered PDF using pdf.js](https://cloud.githubusercontent.com/assets/325899/8235479/3876046e-15b0-11e5-97c0-ecbb5d9f8ee8.png)

You can see that practically every word has some blanks where letters should be.

Note that Adobe Reader (11.0.09) does a _better_ job of rendering but still has many missing characters, and throws up an error message about a font that it "cannot extract", so the PDF itself may be ill-formed (in which case pdf.js should give an error message too).

![screen shot of the same PDF with Adobe Reader 11.0.09](https://cloud.githubusercontent.com/assets/325899/8235615/da33e866-15b0-11e5-96a2-8b9f15c6f74d.png)

const supplementsCount = bytes[pos++];
        for (i = 0; i < supplementsCount; i++) {
          const code = bytes[pos++];
          const sid = (bytes[pos++] << 8) + (bytes[pos++] & 0xff);
          encoding[code] = charset.indexOf(strings.get(sid));
        }
      }
      if (pos === 0 || pos === 1) {
        predefined = true;
        format = pos;
        const baseEncoding = pos ? ExpertEncoding : StandardEncoding;
        for (i = 0, ii = charset.length; i < ii; i++) {
          const index = baseEncoding.indexOf(charset[i]);
          if (index !== -1) {
            encoding[index] = i;
          }
        }
      } else {
        const dataStart = pos;
        format = bytes[pos++];
        switch (format & 0x7f) {
          case 0:
            const glyphsCount = bytes[pos++];
            for (i = 1; i <= glyphsCount; i++) {
              encoding[bytes[pos++]] = i;
            }
            break;
          case 1: