erroneus lengh of the download bar

[Mattia Rizzolo]

today I started an upgrade via update-manager, and I note the progress bar is in an erroneus position. as you can see in the image i have to download 35 MB, but i downloaded only 300 KB and the bar is in a middle position.

now i note this thing in a running VirtualBox emulated system, but in the past i noted other times this trouble.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.5
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Tue Jul 3 16:46:30 2012
DpkgHistoryLog.txt:

DpkgTerminalLog.txt:

GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1341326394
 com.ubuntu.update-manager window-height 330
 com.ubuntu.update-manager window-width 550
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)