I just found that the mirror at mirror.dattobackup.com is out of sync. My installs are failing due to not getting the specific versions of packages I need.

For example, compare the following bad and good mirror sites:

The first has the latest version of libav-tools as 0.8.3-6ubuntu1.
The second has the latest version of libav-tools as 0.8.5-0ubuntu1.

The out of sync mirror is several patch releases behind.

What is the correct way to report this so that the mirror site can be removed from the mirror list until it is back in sync?