Ah, I see what you mean now. Regardless of how hard I try, I just get the error messages, type my password, and then sudo works just fine. Thus I assumed you only talk about getting that message.
If sudo actually refuses to work, then that's indeed a huge problem. Can you please try to write down a recipe which reproduces the problem? -- "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
