Like in The Walking Dead where it's been like a year in the show and most of the walkers can still walk perfectly fine but with a little limp.  Or how about how they still have most of their teeth even though their body is rotting.  I always think about this stuff when I'm watching the show, but whatever.  There wouldn't be a show if there were no walkers.

Yeah from what I've seen the only thing in common between the book and movie is the title, the plot doesn't even look the same.

What I really want to know is how a zombie apocalypse really starts? Because if it is just some random mutation, then I don't see how it could really spread globally

If it is literally people coming out of their graves, then it could be contained by a rapid military response, since their locations could easily and quickly be identified

Until Frank West shows up.

It would all depend on what causes the outbreak. You're talking about something that animates dead corpses and caused them to attack anything alive. Officially, at that point, all of the rules about what makes sense (particularly when it comes to corpses) gets thrown out of the window. Lots of you talking about how they'd just decompose? It'd be nice if that was that simple, especially for the whole "apocalypse" scenario. But if (when ...) it's clear that they are not decomposing like normal corpses, then what?

There not zombies, they are not the living dead, they are humans that cannot be reasoned with as they are consumed with rage and just want to kill, ....they don't eat people

Yeah I know, it's just the best example for those I could think of. It's a very popular movie.

I am not quite sure where you see a problem. They are slow stupid and all you have to do is thrust an object in their brains (the classic zombie)

A pipe would do the trick. Stick one in a watermelon thats easily doable. Also Axes, long knifes swords easily obtainable.You don't have to fight them in a tiny room where 50 Zombies hide. Lure them on the street and split their heads before they can bite you. Zombies have just the strength of the original human they just became stupid slow and don't stop before their brain is damaged.

Well in The Walking Dead everyone is already infected and once you die you turn into a zombie.
So the question would be: How long would it take to find a cure ?
150.000 people already die every day (10% that survive would still make 15.000 every day. Obviously the numbers would be lower because the old and sick probably were the first to day during the apocalypse...but still).

http://www.cracked.com/article_18683_7-scientific-reasons-zombie-outbreak-would-fail-quickly_p1.html