I wanted to thank Mustang3x and Tracker for their advice. We did take our car back to the dealer and told them about the antenna leak thing. The dealership was not that friendly, however. They attempted to say we had taken the car through a car wash and did the damage ourselves. We had not even washed the car at that point. My husband had to "yell" at the dealership people to get them to do this repair. They finally did relent and did the job, and they did it well. Usually, this dealer is pretty good with communication and fairness, but not this time, and my husband had to give them strong ultimatums. He took this thread in and showed it to them. We have since taken our car back to this dealer for one servicing. Everything went well, however, I asked them not to give us a "free car wash" after servicing. Maybe it was their car wash that damaged the antenna to begin with! Anyway, it's been a fair amount of time since the repair has been done. Thanks for everyone's opinions and advice.

 

No leaks here

 

I just noticed an antenna leak on my 2011 Sport. Wanted to let the community know that this is still an ongoing problem so keep watch.

I took it to the dealership and their diagnosis was "the nut to the antenna was loose and the antenna was leaking." There was an extremely faint water ring around the headliner latch system port. I only noticed it on a really sunny day when I was showing off my Fit. The dealership is going to replace the entire headliner.

 

Bump! I just resealed my antenna to the roof, so hopefully no more leaking for me.

 

What did you use? I just used clear calking. Hasn't leaked since... I tried taking my fit into the dealership where I had bought it. They told me, it wasn't covered and would cost around 800 to fix. The car didn't start leaking for about 12 months... Was leaking at the same spot as everyone else...