apt-get update's messages

[Bruno Buys <brunobuys@gmail.com>]

Hi!
I receive these "Ign..." lines, when apt-get updating. What do they 
mean? Is this source being ignored? How do I fix this?

I am running Sarge.

frank:~# apt-get update
Get:1 http://ftp.las.ic.unicamp.br sarge Release.gpg [189B]
Get:2 http://ftp.pucpr.br sarge Release.gpg [189B]
Hit http://ftp.las.ic.unicamp.br sarge Release
Hit http://ftp.pucpr.br sarge Release
Ign http://ftp.pucpr.br sarge/main Packages
Ign http://ftp.las.ic.unicamp.br sarge/main Packages
Hit http://ftp.las.ic.unicamp.br sarge/main Packages
Ign http://ftp.pucpr.br sarge/contrib Packages
Ign http://ftp.pucpr.br sarge/non-free Packages
Hit http://ftp.pucpr.br sarge/main Packages
Hit http://ftp.pucpr.br sarge/contrib Packages
Hit http://ftp.pucpr.br sarge/non-free Packages
Get:3 http://security.debian.org sarge/updates Release.gpg [189B]
Hit http://security.debian.org sarge/updates Release
Ign http://security.debian.org sarge/updates/main Packages
Ign http://security.debian.org sarge/updates/contrib Packages
Hit http://security.debian.org sarge/updates/main Packages
Hit http://security.debian.org sarge/updates/contrib Packages
Fetched 3B in 13s (0B/s)
Reading package lists... Done

thanks!