Problem with progress bar when copying from an external device to another slower

[sm bo]

During the copy from an external device to another slower, when the progress bar reaches 100%, the window doesn't close and the copy continue, I suppose.
I think that the bar follows the progress of the reading from the faster drive.
Indeed, when the bar reaches 100%, the source unit stop working while the target unit continues working.
I found a report similar to this bug
(https://bugs.launchpad.net/ubuntu/+source/fl-cow/+bug/599755),
but that affects the package fl-cow that isn't installed on my pc.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: nautilus 1:3.2.1-0ubuntu3.2
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
NonfreeKernelModules: nvidia wl
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Thu Jan 19 20:28:12 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel Letzeisen (dtl131)]

Probably a duplicate of https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/30640