The errors of the Millenium (Trilogy)

With the New Year I started reading the so called Millenium Trilogy by Steig Larsson. I've read them fast, a sign that I have the time and I'm enjoying the story, and after finishing the the first one, I immediately bought the second one and started reading it. So, yes, I've enjoyed them, but there is something that is driving me crazy: The errors. The author describes a hacking attempt through the internet as if it were a telephone line. In "The Girl with the Dragon Tattoo" the protagonist, the girl with photographic memory, which is useless, eidetic memory is what you want, the incredible hacker, desires a 17' G4 Aluminium Powerbook with an impossible memory configuration that could have never existed. No only that by the second book, "The Girl Who Played with Fire", the machine has transformed into a 17' Titanium machine that also didn't exist. The errors made me suspect everything the author said, so when he talked of a Kawasaki 125 motorcycle I had to check if such a motorcycle existed, it does, several, actually. But the main thing that has been bothering me is the question: Why does the author felt the need to give such detailed description, but not the need to be precise and research a little? Did he do it on purpose or was it just carelessness on his part? If he did it on purpose he actually made his novels worse, in my opinion.