It turns out it's a problem with the file format: http://lists.gnu.org/archive/html/bug-gzip/2010-03/msg00009.html
-- "gunzip --list" displays nonsense for very large files https://bugs.launchpad.net/bugs/513232 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