Hi Petr, can you please send me a couple of the PDFs that don't work? (David posted one that does work)

I had tested this with .ai files saved from Illustrator CS that were set as "PDF compatible". I assumed that PDFs would also follow this same structure, maybe something is slightly different.

PDF is a pretty difficult format to support well, it's structure is pretty complex. It will probably take some tuning for it to work better.

- Michael