That's the whole point. A 160GB hdd, which would appear in 10.5 and Windows as 149.7GB, is now accurately reported as 160GB because of the way SL calculates disk size, and hence you get extra space.
It's people like you that make the internets stupid. Read carefully.
Normally memory is calculated in base 2.
This means 1 kilobyte = 2^10 bytes = 1024 bytes.
When memory is
incorrectly calculated in base 10, it turns out like this.
1 kilobyte = 10^3 bytes = 1000 bytes.
Hard drive manufacturers
should have advertised their hard disk space in base 2. Instead, they advertised it in base 10, to make it seem as if there was more space in their hard disks.
Eg.
Let's say there you have a hard disk advertised to have 320gb. This is in base 10 because the manufacturers wanted to make it seem it had more.
320GB = 320 * (10^3)^2 bytes = 320,000,000 bytes
If it was correctly labelled to be in base 2, then it would have looked like this.
(320000000)/(2*10)^2 = 305.1757... GB
All computers read memory in base 2 and this is because of binary (I'm not going to explain binary to you. Do computer science or electrical engineering, or read it up on the net).
So all computers read 320GB hard disks as having 305GB. What you're saying is "Oh noes! Where did the other 15GB go?"
It didn't go anywhere. It's still there, but because of the way computers calculate memory, it
appears as if there's less memory on the hard disk.
Now Apple, in this stupid new move to appeal to the computer illiterate generation, such as yourself, decided to display everything in base 10. Now, the computers still calculate everything in base 2, as this is how binary works but at the end of all the calculations, it appears in base 10 (nice going Apple).
So now Snow Leopard reads hard disk space the same way the manufacturers labelled them. This does
not give them extra space. It is a cosmetic 'upgrade'.
So now am I justified in calling you an
idiot?