方才看到的∼

http://www.archlinux.org/news/461/

Hello all,
Due to an error in our backend scripts along with the new version of
pacman, a large number of packages were removed on our central server,
causing all mirrors to delete these packages when syncing. This happened
on Sunday August 16th. When we finally caught it (6 hours later), we
restored the packages, but a lot of mirrors had already synced. Currently,
due to bandwidth limitations, all mirrors will take some time to sync back up.

This affects all repos except community, though it appears core and testing
are mostly re-synced on a majority of mirrors. Only extra remains an issue.

We apologize for the inconvenience. Steps have been taken to ensure
this doesn't happen again.

這可以解釋為什麼這幾天有些程式庫老是丟包找不著