Audio problem: In a recent episode where Jane is moving into Ian's place, she accidentally knocks over Ian's daughter's clay vase she made. When you hear the crash, it sounds something like glass shattering on tiles, but it's clay that has fallen on a carpet.
Audio problem: 30/9/10 Throughout the scene when Stacey and Janine are fighting, you can hear the sound effects of thunder and falling rain but you can not see the rain and no one is getting wet.
Audio problem: In series 10, episode 15 Episode 867, transmitted on 25 May 1993, during Nigel's birthday party everyone is dancing and talking loudly to be heard over music - but no music has been dubbed into the scene. The scene lasts several minutes and seems increasingly bizarre as the dancing is energetic and Nigel even takes Debbie to the stairs to talk to her somewhere quieter... But there is no music at all.
Audio problem: In the 9/11/2010 episode there is a scene where Alfie and Roxy have just got back from selling her things to pay for Ronnie's wedding. There is a different audio range from normal speech - Roxy's voice comes across rushed and too loud compared to the other lines she speaks. Also her mouth does not move in sync when she says "So how you feeling about tomorrow, are you nervous?" (00:24:15 - 00:25:00)
Answer: Most likely a mistake by the set designers or it's a recycled set which already had the switch on (they just repaint and add other fittings).
At my workplace there is a two-gang switch with a three-gang switch underneath it, one of which is for the shop lights, the other four have no apparent use.