Todays updates

[v3.xx]

Failed to fetch http://us.archive.ubuntu.com/ubuntu/...amd64/Packages Hash Sum mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...amd64/Packages Hash Sum mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...-i386/Packages Hash Sum mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...-i386/Packages Hash Sum mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...Translation-en Hash Sum mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...Translation-en Hash Sum mismatch
Some index files failed to download. They have been ignored, or old ones used instead.

Two of my three mate 15.10 installs get this hash mismatch. One install completed without issue. All three are set to "Server for U.S."; wonder whats going on.

[ventrical]

Switch source to Main and see whats happens.

Regards..

[v3.xx]

And thats all it took. Solved and thanks.