There are some universes which claim or pretend to be consistent and aren't (Star Wars), some which try but know they can't and do their best (Star Trek), some that are consistent, but likely due to a limited run (Firefly, either Galactica), and then ones that want to entertain and don't worry about consistency, and Futurama is in the last category.
From this I want to know two important things
- Has the Futurama fandom ever reacted negatively to one of its many consistency hiccups?
- Was there ever a retcon of a consistency error with the purpose of placating an angry fanbase?
(Remember, as ever, 'no' is an ok answer)