I'm having this problem as well. I'm running Ubuntu Gutsy. I tried to open Synaptic and it closed halfway through retrieving updates. I get the segmentation fault (core dump) errors whenever I try to do apt-get upgrade or aptitude update.
-- apt segmentation faults (core dump) in feisty https://bugs.launchpad.net/bugs/72475 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs