Continuity mistake: When Jimmy is talking outside the courthouse, pretending to be his secretary, he puts his case on his car roof. In the first shot the white aerial is visible in front of his case. Shortly afterwards it's hidden, either behind or on top of his case, without him touching anything.
Add timeJon Sandys
Factual error: When Mike is meeting with Lydia in her office, you can see an undeveloped hillside from Lydia's office window with sagebrush and other desert shrubs common in New Mexico. However, Lydia's office is in Houston, Texas, where such plants do not grow. Houston also does not sit in the desert, it lies in a coastal plain where it is much greener than Albuquerque.
Character mistake: When Jimmy and the film crew are on the school campus, they are approached by the school administrators. Jimmy mentions an "Annette" who works at the superintendent's office. One of the admin asks the other if they "know an Annette downtown." The superintendent's office is not located in downtown Albuquerque, it is in uptown Albuquerque, several miles east of downtown.
Other mistake: When Jimmy goes looking for the Kettlemans, he climbs up the Sandia Mountains but finds them in a flat forested area. To get to a level forested area in the Sandias, Jimmy would have had to climb all the way to the top, which would be suicidal, because the area of the Sandias he goes into is extremely rugged and steep, plus he goes in there with nothing but a suit. Even the Kettlemans would be insane going that same route with two kids, a tent, and camping supplies in tow.
Factual error: At the start of the scene where Jimmy films a commercial at the school, kids are shown on the playground. Many of them are wearing leggings or skinny jeans. The episode is set in 2002, when the trend was flare and straight legged jeans. The skinny jeans and leggings trend didn't become widespread until 2009 or 2010.
Continuity mistake: When Kim has finished her interview she goes to the roof car park and lights a cigarette whilst the camera shows the street with parked cars. When she reaches into her purse to tear up the WM business card two of the vehicles have disappeared - a white car and a van which had its hazards flashing. All happens in under 8 seconds. In the same scene, when she unlocks her car it is in a bright patch of sunshine, in the close up it's all in shade.