Failed to fetch http://ro.archive.ubuntu.com/ubuntu/pool/universe/s/sweethome3d-furniture/sweethome3d-furniture_1.3.2-1_all.deb Hash Sum mismatch

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I tried downloading the sweethome3d-furniture_1.3.2-1_all.deb package file from ro.archive.ubuntu.com and from archive.ubuntu.com and the files are different. So it seems to me that the file on the ro server is broken.

Try the following:

Open a terminal (e.g. by simultaneously pressing ctrl-alt-t) and issue the commands

cd
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/s/sweethome3d-furniture/sweethome3d-furniture_1.3.2-1_all.deb
sudo cp sweethome3d-furniture_1.3.2-1_all.deb /var/cache/apt/archives/
rm sweethome3d-furniture_1.3.2-1_all.deb

and then try updating your system again.

One month has passed, and the sweethome3d-furniture_1.3.2-1_all.deb file is still broken on ro.archive.ubuntu.com. Does anybody know who should be notified in order to get this broken .deb fixed?

You could try https://wiki.ubuntu.com/Mirrors#Communication or https://launchpad.net/~ubuntu-mirror-admins

It's fixed now; I don't know since when, because I haven't checked lately. I've sent a message on the mirror admins' IRC channel sometime in march. Thanks.