Audio problem: Throughout the series the engine sound from Walt's Pontiac Aztek sounds like a 4-cylinder engine, but the Aztek was only ever available with a V6.
Audio problem: The message from Walt that Skyler listens to at the office is different from the audio earlier in the episode. Walt says "no" when we see him, but on the recording he doesn't say it.
Audio problem: When Jesse rings Jane's phone when it's cut off, Jesse is still pressing buttons but there is no sound, despite there being sound when he pressed buttons before.
Suggested correction: He only presses 2 buttons. Anything else is just something like his thumb twitching, like he's anxious or nervous. You see him call Jane's phone multiple times by only pushing 2 buttons.
Green Light - S3-E4
Audio problem: When Walter is berating Jessie at the school parking lot, there is a shot of the back of Walter's head. He is talking but it's clear his mouth isn't matching.
Audio problem: When Walt yells at Jesse through the lab's entrance door, the sound is very muffled, as if the door is a major insulator of sound. However, later, when Jesse yells at Walt through the same door, the sound is much clearer, and hardly muffled at all. (00:22:15 - 00:23:55)
Audio problem: After Walt Jr and Skylar leave the room, Marie starts to leave. The camera is focused on Hank once she walks off screen and you can hear the sound of the door closing behind her. It then cuts to showing her suddenly just getting to the door and opening it to walk out.
Dead Freight - S5-E5
Audio problem: The engine's horn sound constantly changes before the train is robbed. And when the train begins to move again, a railroad crossing bell is heard, even though the crossing ahead just has crossbucks.
Say My Name - S5-E7
Audio problem: When Mike says all that left is to leave town, the audio in the over the shoulder shot stops but Mike's mouth keeps moving. (00:41:20)
To'hajiilee - S5-E13
Audio problem: After Hank and Gomez separate Jessie and Walt after he's arrested, Hank tells Gomez that "I'll call the Tribal Police on my way out, let them know we're here." During the middle of this line, the shot cuts to Walt and you can distinctly hear the sound of a microphone picking up the actor breathing on it as he recorded this line in ADR.
