I sometimes bring this up with the stuff I watch. Simple errors that have no explanation or are simply wrong. Like right now I'm watching the pilot episode of Futurama. In this episode, Fry falls into the cryogenic freezing tube thingy.
OKAY: This is that type of thing I'm talking about. Fry falls into the tube at 12:00 a.m. on January 1, 2000. The capsule thing sets itself to 1000 years. However, when the timer expires, Fry is let out during the day on December 31, 2999. This would not be 1000 years. It would be slightly less; 999 years, 364 days and a few hours.
Then there's another example from the Simpsons where their chronology dealing with Marge's pregnancy with Bart and Homer and Marge's ages simply do not work out. (Marge being pregnant right out of high school, but Bart being 10 years old and Homer and Marge being in their late 30s).
TOPIC-What are some errors that you've found that bother you to no end?