No, I can view the comments fine in the Review pane in RH. But when I export to PDF for review, only the tracked changes are visible.
Ahhh my bad. I was misunderstanding the issue.
What I thought at first was that comments were being added to the PDF and when it was imported back into RoboHelp, they weren't showing.
Seems you are referring to the reverse? Comments exist in the topic (either by adding them directly or by virtue of importing a commented PDF from a review cycle) and they aren't being added to the PDF being sent for review.
I'm not sure I ever tried that but I just did and sure enough, I don't see them in the PDF after creating it.
Not sure if this is a bug or if it's by design. As you say it seemed to be working before (earlier version of RoboHelp perhaps?) I'd say you likely need to report it to Adobe by clicking the link below.
In which version of RoboHelp did you get the comments as well?
Was it part of the Technical Communication Suite or did you use the PDF generator that ships with standalone RoboHelp.
I'm not seeing the comments in the PDF in any recent version but I do have multiple versions of RoboHelp and that could affect this issue.
See www.grainge.org for RoboHelp and Authoring information