I was just wondering, when I first got my Macbook, it had 10.5.0 on it. Then I had to download 10.5.1 when it came out (and so on to the present). However, after I reinstalled Mac OS X yesterday, I just had to install 10.5.6 (the present release). Why is it that I didn't have to download 10.5.1-10.5.5 to get all those features each one offered? Just curious. Thanks for reading.