Factual error: The home computer tablet controlling the alarm system shows June 11th, 2015 as a Wednesday. 06/11/15 was a Thursday.
Food Fight - S3-E2
Continuity mistake: At the start after Teddy steals Oscar's fries, he eats them, leaving his fork empty. The angle changes and suddenly there are plenty of fries on his fork.
Continuity mistake: Jimmy gets ambushed. One gang member holds a gun close to Jimmy's face, but in the next shot the guy is way further away from him and not even visible in the shot when Jimmy gets splattered with blood.
Row Row Row Your Boat on a Rocky Sea - S9-E1
Revealing mistake: Dr. Charles reads the patient's chart. Near the bottom, it says, "Is this enough filler? My hand hurts." (00:19:30)
Visible crew/equipment: Wesley enters Vladimir's office to talk with him and Vladimir had a large white window behind him. As they talk, the reflection of a green screen of these windows is in Wesley's glasses. (00:06:34)
Suggested correction: I believe this is just the reflection of the window. Modern glasses have an anti-reflective coating on the lenses that can sometimes cause certain reflections to appear green. I dated a girl who wore glasses, and I regularly noticed reflections in them that were green in colour.
Not to mention, why would they use a green screen if nothing is visible outside the window? For that matter, why would they illuminate a green screen if it wasn't visible in the shot?
Continuity mistake: The shield design that Winn sketches on the paper changes between him starting to draw, and him showing it to his friend a second later.
Episode #1.8 - S1-E8
Continuity mistake: Towards the end, as everyone's gathering outside, Ken Marino has his hand in the front pocket of his shorts. The shot switches to a view from behind, and it's in his back pocket. Back to the front, and it's back where it was before. (00:22:10)
Continuity mistake: When Vaughn's assistant puts down the newspaper in front of him, it switches position to the left between shots. (00:38:20)