Nautilus won't leave the current folder until it's done computing every subfolder's size!

Steps to reproduce:
- open a folder
- notice as Nautilus statrs computing subfolder sizes ("...." is displayed instead of the size until the size is computed)
- immediately double-click on one of the subfolders

Expected:
- Nautilus should stop computing the subfolders' size, and immediately open the requested folder instead

Observed:
- Nautilus stupidly keeps computing the subfolder sizes, and only when all of them are computed (and displeyed) then it will open the requested folder

So sometimes when you enter a folder it may take a while until you can leave it, and it is not for a reason.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: nautilus 1:3.5.90.really.3.4.2-0ubuntu4.2
ProcVersionSignature: Ubuntu 3.5.0-28.47-generic 3.5.7.9
Uname: Linux 3.5.0-28-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: i386
Date: Sun Apr 28 20:31:26 2013
GsettingsChanges:
 b'org.gnome.nautilus.window-state' b'geometry' b"'1322x722+232+100'"
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'180'
 b'org.gnome.nautilus.window-state' b'start-with-status-bar' b'true'
InstallationDate: Installed on 2010-06-23 (1040 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to quantal on 2013-01-13 (105 days ago)