I've detected the problems: 1) the checkbox for its status (checked/unchecked) looks for "http://archive.ubuntu.com"; instead of "http://security.ubuntu.com"; 2) if again you uncheck and check the hardy-security after switching back to "archive.ubuntu.com", it will add the hardy-security with "http://security.ubuntu.com";, which will show as non-canonical third-party software repository
Execute in terminal: gksu /etc/apt/sources.list Change any occurence security.ubuntu.com to archive.ubuntu.com For example, I changed: deb http://security.ubuntu.com/ubuntu/ hardy-security universe main multiverse restricted deb-src http://security.ubuntu.com/ubuntu/ hardy-security universe main multiverse restricted ..to: deb http://archive.ubuntu.com/ubuntu/ hardy-security universe main multiverse restricted deb-src http://archive.ubuntu.com/ubuntu/ hardy-security universe main multiverse restricted ..things will be back to normal: Don't uncheck and check the checkbox in Software Sources > Updates again, it will cause the same problem -- Checking security repository in Updates adds deb line to Third-Party Software https://bugs.launchpad.net/bugs/244093 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
