Alt-tab viewer shows 2 windows even if only 1 window is open

[Nekhelesh Ramananthan]

Steps to reproduce:
Open gedit or chrome (only certain apps) and press alt-tab to switch between the applications.

Expected Result:
Three icons shown in the alt-tab preview which are desktop, gedit and the chrome icon.

Actual Result:
You will notice that the alt-tab shows desktop, 2 gedit windows and chrome open even though only 1 gedit window is present.

I have attached a video screencast showcasing the bug. I am running the latest daily build of Precise 12.04 with Unity 5.2. More information will be provided if required.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-14.23-generic-pae 3.2.3
Uname: Linux 3.2.0-14-generic-pae i686
ApportVersion: 1.91-0ubuntu1
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,vpswitch,regex,imgpng,place,gnomecompat,grid,mousepoll,snap,move,resize,wall,session,animation,expo,workarounds,fade,ezoom,scale,unityshell]
Date: Mon Feb 6 19:34:48 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120116.2)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-02-03 (2 days ago)

[Bilal Akhtar (bilalakhtar)]

Does this occur every time?

And, does running unity --reset fix the issue?

[Nekhelesh Ramananthan (nik90)]

No this does not occur every time. I have not tried unity --reset. I'll try that and check if it happens.

[Nekhelesh Ramananthan (nik90)]

I tried Unity --reset and this issue still occurs sometimes.