There isn't much to say about this one: when I run Software Updater, I get the above error message. That can't be good.
Interestingly, when I click on "Settings..." and then close the settings dialogue that pops up, all of a sudden Software Updater successfully finds updates and installs them.
I thought I should bring this to the attention of the Ubuntu community.
sudo apt-get update returns the following:
W: Failed to fetch http://ppa.launchpad.net/deluge-team/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
I have screen captures, but I don't have enough reputation points to post them.