Jonathan, I don't know if this is causing your issue, but there is a traceback in your software center log that indicates that you're using a version of piston-mini-client from the canonical-ca-hackers-staging PPA that doesn't have the right dependency specified. The code recently switched to using python-oauthlib, but the PPA version has a debian/control file that specifies python-oauth, so you don't have oauthlib on your system.
I'm not sure what the right fix for that is, but I wonder if installing python-oauthlib would fix this bug for you? I've taken the liberty of assigning this to Anthony since he built that PPA package. ** Changed in: software-center (Ubuntu) Status: New => Confirmed ** Changed in: software-center (Ubuntu) Assignee: (unassigned) => Anthony Lenton (elachuni) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1125587 Title: Cannot install Steam To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1125587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs