Thanks for your fast response, Aravisian.
Unfortunately, Adobe Reader can’t access updates when run under PlayOnLinux.
I did manage to get the comment function working in Adobe Reader 9.5.5 – it seems that the restriction isn’t internal to the Reader; instead, it depends on whether or not the file was saved with commenting enabled.
And thanks for the link. But the link concerns Acrobat Pro, not Adobe Reader.
Yes, I’ve checked the WineHQ forum. That’s the link to the WineHQ AppDB in the post above. But it’s difficult to sift through all of the comments. Their approach seems random and ad hoc. I’ve tried some of the proposed solutions, but they haven’t worked for me. I did learn about needing to install the Segoe fonts from the forums, though.
Thanks again for your help.