Number of white triangles to the left of launcher icon doesn't update

[Michael Chen]

When I have one Firefox window, and in Firefox I press Ctrl + N to open a new window, I expect that the number of white triangles to the left of the Firefox icon changes from 1 to 2. What actually happens is that the number of white triangles is still 1.

(What I mean by white triangles is described at http://www.tomshardware.com/reviews/ubuntu-11.04-natty-narwhal,2943-7.html "In Unity, multiple white triangles appear...")

Steps to reproduce the bug with Firefox:
1. Have at most two Firefox windows in a workspace.
2. Switch to one of the Firefox windows (or open a Firefox window if none are open), and press Ctrl + N.

Steps to reproduce the bugs with Terminal:
1. Have at most two Terminal windows in a workspace
2. Switch to one of the Terminal windows (or open a Terminal window if none are open), and press Ctrl + Shift + N.

These steps don't work with LibreOffice Writer, by the way.

The number of white triangles becomes correct when I press the Workspace Switcher button.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.0+14.04.20140416-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Sat Apr 26 13:07:21 2014
InstallationDate: Installed on 2014-04-18 (8 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)