I have a bug with incorrect work with icons on the Unity launcher.
How to repeat:
1. Run any application that does not have an icon on the panel (in my case it is Calc) .
2. Move the new icon of opened application up, say, the fourth position.
3. Close the application.
4. Non-active icon should be remaining on the launcher, and still can be removed manually from it, but it is not normal behaviour.
Then what can happen - if you open and close a new files using, for ex. Nautilus, for few times (6-7 times) new windows will be attached to the icon, but then it begins to create a second, identical icon. (see screenshot #1)
And now buggy icon can't be removed, it can only be "attached" or I can run the application from there. To remove new icons I need to reboot PC or Unity.
You can repeat in cycles, that's the beauty of what I get: see screenshot #2 .
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: unity 7.0.0daily13.04.15-0ubuntu1
Uname: Linux 3.9.0-030900rc6-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
Date: Wed Apr 17 11:09:22 2013
InstallationDate: Installed on 2013-02-14 (61 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
ProcEnviron:
LANGUAGE=ru_UA:ru
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=ru_UA.UTF-8
SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to raring on 2013-02-14 (61 days ago)
Screenshot #2