aMSN adds multuple icons entries into unity for each new window

Binary package hint: unity

Ubuntu 11.04

amsn:
  Installed: 0.98.4-0ubuntu1
  Candidate: 0.98.4-0ubuntu1
  Version table:
 *** 0.98.4-0ubuntu1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ natty/universe i386 Packages
        100 /var/lib/dpkg/status

Expected:
While chatting with aMSN it opens new chat windows automatically, I expect this to be under one aMSN icon entry on unity

Actual:
You get multiple aMSN icons appearing in your unity bar

Reproduce: (I have a permanent link to aMSN)
1. Load and sign in to aMSN
2. Start new conversations
3. Try to access these through unity (you have to guess the right icon)

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.10-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
NonfreeKernelModules: fglrx
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,grid,regex,neg,move,place,mousepoll,resize,imgpng,vpswitch,gnomecompat,snap,session,animation,unitymtgrabhandles,workarounds,wall,expo,ezoom,staticswitcher,fade,scale,unityshell]
Date: Mon May 2 18:12:52 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to natty on 2011-04-29 (3 days ago)