Hey Markom,
Yeah, I've tried those printer settings. Nothing doing. I wanted to download Foxit, but I'm on a mac.
"Summarize comments" was interesting. It put a numbered flag on each place on the page where there was a scribble. The scribble itself did not show up, though.
As you said, Adobe is picking up the layer. But it won't flatten the layer (in order to print) without buying pro. Hopefully there's a free, Mac-friendly solution!