Apart from the fact that the warning message might be a bit scary, I don't see a problem with it. After all, it is true, and if your clock jumps, then there's definitively a problem.
So what exactly do you want to change here? -- "sudo -k" fails when timestamp is in the future https://launchpad.net/bugs/43233 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs