Sid vs Unstable
 

What is the defirents between sid and unstable. As much i know both are same. but got the defirents in file size of main package.

Get:3 http://mirrors.kernel.org unstable/main Packages [3111kB]

Get:3 http://mirrors.kernel.org sid/main Packages [4129kB]

Sid is the name of the unstable branch.

old stable = Woody
stable = Sarge
testing = Etch
unstable = Sid

I don't know why they are different sizes, though.

Strange that it parses and tries both lines of sources.list
The default and latest is sid. Remove the line unstable

yes, i am using only sid.

But my question is why this are not same ???????

Can you please provide us with links to the exact locations of the two files you're comparing?

I allready showed the link with the debian version.

ha ha ha
They make the correction

In fact you can see that mirrors.kernel.org resolve to 2 different adresses. So depending on when you query their dns you might fall on 204.152.191.7 or on 204.152.191.39. I don't know how they synchronise these 2 but it can take up to 24 hours to propagate the change.
Maybe try to use a dedicated debian server (http.us.debian.org) ?