Roof sharkfin loose

I just noticed today that the shark fin on the roof is lifting up on one side. Sucks because I was at the dealership yesterday too, could have at least had them look at it and tell me what they think needs to be done.

I know it's a warrantee item, I'm just curious if anyone has pulled it off to see how it is mounted. Doesn't look like 2 sided tape or adhesive, but I can't tell from the side that is loose.