Mine is going onto 10 months now. The only problems I have is the black top roof molding strip on "both" sides of the car are coming unglued just where it meets with the windshield.
I also have a real annoying rattle in my front dash somewhere around the touch screen. (seems to come and go with temp change)
Other then that, no big problems and I am happy as a kid on Christmas Day everytime I drive my car.
BTW, has anyone else noticed a funny odor when you open the trunk. I have nothing stored in mine, and I never have used it except for a few runs to the food store. (Wife does all the food shopping in her car) It smells like the new car smell with an added strong chemical type smell. Could this be the smell from the hybrid battery pack?
I, too, had the rubber moulding coming unglued on the roof. Dealer replaced it no questions asked (when I mentioned it). I just had to wait a week or so for the parts to come in.
As for the rattle, if you trust your dealership enough, some have reported the same, and all that was needed was to tape down a connector wire that's behind the display that would occasionally make rattling noises...
As for your smell in the trunk - have you tried isolating if it's the spare tire (most common), or are you certain that it's coming from either the 12v battery (on the left) or the hybrid battery (shelf)? A few people have had issue with the smell from their spare tire, and getting a tire bag from a local tire shop seems to help them.
My only other dealer-replaced item so far (other than the roof molding) was my combination meter (the display where the spedometer/odometer/fuel gage/etc. live), as for some unknown reason around 5000 miles my main odometer stopped displaying (ODO didn't display anything, yet Trip A and B (which use the same display digits) were working fine...) anyhow, I keep good records of service visits and gas logs, so I know how many miles off my new odometer is to within about 2 miles (assuming rounding error with the trip odometers).
Earlier in the month I did have the check engine/hybrid warning light scenario, which cleared itself on its own in the parking lot of the dealer (~3mi. drive). Error P3191, which the dealer claims that a new 12v battery is needed and keeps insisting that I must've had to jumpstart the car sometime (I haven't - the little 12v has been good to me). Still waiting on that replacement 12v (backorder), and the dealer is also waiting for 3 more for cars that are on their lot...