Hi,
We've noticed differences in conversions on different environments. I've attached samples which help explain the differences.
On Ubuntu 10.04.4 LTS and CentOS release 5.9 (Final) some of the text overlaps in the generated PDF, if I take the same code and source pptx and generate the file on CentOS release 6.4 (Final) the PDF generates as expected.
I can provide the CentOS 5.9 (Final) image if you're unable to reproduce this issue on your internal environments.
Thanks,
James