Comment 27 for bug 615902

I had the exact same error read out as CI Open Source Foundation on Sunday night August 15th. That being said I got some kind of updates in my package manager and got a clean install last night Monday August 16th.

I'm not sure if the packages were pushed from the regular Kubuntu PPA or if they came from the backports per ppa:kubuntu-ppa/backports, but this has been fixed for me.