I guess that apport is still using CoreDump.gz form launchpad instead of local coredump :/
-- [apport] firefox-bin crashed with SIGSEGV in __kernel_vsyscall() filling out a bug report https://launchpad.net/bugs/94882 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs