That is just ridiculous!!!!
My car is a petrol and the gears play up from time to time as i said before 2nd to 3rd is hard to get in and they can feel notchy and stiff, but with my first civic I was told about 6 times that there wasn't a problem and even when they did experience the fault they said "yeah but it was just the once"! Grrrrrrrr
As for the bumpers you should print the photos off from on here and take them in, its just outrageous Honda CS tried to tell me they hadn't heard of it before.
The problem with intermittent faults is they never seem to find them
Im sorry I truely think that the service departments of most Honda Dealerships are rubbish!