Updater download progress is very erratic

[Robin Sheat]

The download progress is very non-linear. I've had the downloaded amount go from 1005MB to 988MB, back up to 1007MB then to 1004MB, and the total changes too.

Those things are hard to show in a screenshot, but the attached shows what should be an impossible situation.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: update-manager 1:0.174.3
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Aptdaemon:

Architecture: amd64
Date: Fri Nov 30 08:32:54 2012
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'1354216081'
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'600'
 b'com.ubuntu.update-manager' b'window-width' b'600'
InstallationDate: Installed on 2011-04-26 (583 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to quantal on 2012-10-20 (39 days ago)

[Robin Sheat (eythian)]

A short time later, it was saying something quite different again

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

Ubuntu 12.10 (quantal) reached end-of-life on May 16, 2014.

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue using a maintained version of Ubuntu then please let us know otherwise this report can be left to expire in approximately 60 days time.

[Launchpad Janitor (janitor)]

[Expired for update-manager (Ubuntu) because there has been no activity for 60 days.]