[Bug 1226991] [NEW] update-manager says "your computer is up-to-date" whereas there are still 48 packages to be upgraded

[G.M.]

Public bug reported:

- I run the update-indicator applet, which notifies me this morning that I have 51 updates to install. I run the "Execute" command which ends up installing Firefox only and saying "your computer is up-to-date", whereas the indicator still indicates 48 updates to install. 
- Trying the "Execute" command again does nothing. 
- Executing the update-manager command-line does nothing, still says "your computer is up-to-date"
- Running synaptic and selecting "Mark all updates" installs the 48 lacking updates...

Worked like a charm until last week.

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1226991

Title:
  update-manager says "your computer is up-to-date" whereas there are
  still 48 packages to be upgraded

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  - I run the update-indicator applet, which notifies me this morning that I have 51 updates to install. I run the "Execute" command which ends up installing Firefox only and saying "your computer is up-to-date", whereas the indicator still indicates 48 updates to install. 
  - Trying the "Execute" command again does nothing. 
  - Executing the update-manager command-line does nothing, still says "your computer is up-to-date"
  - Running synaptic and selecting "Mark all updates" installs the 48 lacking updates...

  Worked like a charm until last week.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1226991/+subscriptions