An explanation is needed on aptitude working.

[Sthu Deus <sthu.deus@gmail.com>]

Good day.

Could You please explain me the situation. On aptitude update I see
this:

Err http://ftp2.jp.debian.org testing/updates/main Packages
  404  Not Found [IP: 61.206.119.174 80]

And latter I see:

Get:16 http://ftp2.jp.debian.org testing/main 2010-06-23-2114.45.pdiff
[372B] Get:17 http://ftp2.jp.debian.org testing/main
2010-06-23-2114.45.pdiff [372B]

I do not understand how it can be: at first aptitude can not find
packages, and then latter, it does. How is it?

Thank You for Your time.