...and, just tried aptitude clean followed by aptitude update once again. Looks like something was sorted out server-side:
Get:1 http://archive.canonical.com lucid Release.gpg [198B] Ign http://archive.canonical.com/ lucid/partner Translation-en_US Get:2 http://archive.canonical.com lucid Release [8,215B] update completes without errors. ** Changed in: apt (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/989134 Title: aptitude/apt-get update error: BADSIG 40976EAF437D05B5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/989134/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs