Continuity mistake: Sometimes Ed's fireplace in his office is on the right wall but then other times it's on the left. Plus Ed and Mikes' offices switch sides mid series. Ed's office is stage right in early years, Mike's is stage right in later years.
Continuity mistake: In the opening scene, Mike is cooking bacon on a gas stove. He is talking to Vanessa and is seen to shut off the gas under the frying pan. The scene cuts to Vanessa and then back to Mike. The gas under the pan is suddenly back on.
Revealing mistake: There are numerous episodes where Mike is recording a video for Outdoor Man with his webcam, and a status bar is advancing towards the end of the video, indicating that the live recordings were added to the video stream in post production and synced up to the original performance.