Comment 16 for bug 163116

Changing status back to "fix released". Invalid means that there was no bug to begin with.
See also https://wiki.ubuntu.com/Bugs/Status

See this bug to learn about the automatic daily apt-get update process, and the user interface issues with how to know if you really are up to date.
https://bugs.edge.launchpad.net/ubuntu/+source/update-manager/+bug/35009

Seems to me that you just need to click on the update-manager's "check" (or perhaps "reload" for dapper?) button to manually get updates right away