Source of miscommunication

Do you recall all those sitcoms during the 70s and 80s that had the fake laugh tracks built in?  I disliked the laugh tracks immensely because of the lack of authenticity.  However, something bugged me even more and still does today when it is present.  I remember specifically one episode of "Three's Company", in which one of the girls, John Ritter, and  maybe even Don Knotts kept walking in one door and out another at varying times, thereby missing each other completely.  If someone would have just stood still, they might have connected, but everyone was doing their own thing and on a complete different directional field from anyone else.  It made me crazy!!! Just stop! I wanted to cry out to them.
I was thinking about this as Dave and I were talking about what we think makes people miscommunicate in the first place.  I started laughing and said, "It's like one of those ridiculous episodes of 'Three's Company' when they are going in and out of doors missing each other!"  
The problem occurs when we are going about our business without paying any mind to what other people are doing or have to say.  We get so caught up in our own agenda, we forget to realize there are other agendas in the world.  Maybe it's taking "minding our own business" to an extreme.  
Take a minute to think back to the last miscommunication you had with a co-worker, spouse, significant other, or family member.  What was the true source of frustration?  I would love to hear your answers and even how (or if) it was resolved.  
Just for today, let's take a look at the source of miscommunication and try to connect with the other people in our lives.  
Happy communicating,
Shelly