My handle just popped off slightly today for the first time after my car was sitting with the sun on the side in 90+ heat. I think I'll try some sort of gooey cement such as Shoe-Goo or Barge. I have plenty of epoxies but I don't think they'll hold well to the smooth plastic surface and I don't want to try to get in there to roughen them up. It's only happened once and if I hadn't read this thread I probably wouldn't have noticed.
I'm a week past 3 years since my in-service date but my mileage is about 20.5k. I assume the 3 year/36k mile warranty is the lesser of the two, right?