Yes, I just noticed this problem with mine. I am the original owner and it has always been garage kept with minimal exposure to extreme heat. It looks like glue is failing along the front and right corner post. I have a friend with a very good auto body shop and will take it there to see if they can repair or recommend someone who can. I will post an update when I have more information.
Body shop highly recommended a person whom they send all of their interior work to. I went to see him. Foam under headliner material is deteriorating and as others here on the forum describe, the whole headliner will eventually come down. It will be in the shop one day. All old foam removed, new glued in. New headliner installed. $250. Shop is located near Oswego, IL for the people in Elburn and Joliet, IL. Just got another glowing review about this guy. Scheduled to go in on 23rd.