Applications keep showing up twice on the launcher

[William]

I just did a fresh install of 11.10 Desktop 64-bit. When trying to add some new application to the launcher weird things are happening.

The problem is the following:
I tried opening a Terminal from the Dash. When the terminal icon appeared in the Launcher, I chose Keep in Launcher. Then I close the terminal. As expected the Terminal icon is still in the Launcher. So far so good.
Now, if I open a Terminal using the Launcher, a *second* Terminal icon appears, and stays after closing. If I open Terminal again, a *third* will appear and so on.

Screenshot: http://i.imgur.com/yd66k.jpg

The same happens with other applications that were not initially in the Launcher, but not with the original ones, like Ubuntu One.

The problem can be solved by logging out and in again every time I add a new icon to the launcher.
It's not user specific. I created new users, both Standard and Administrator and the problem persists.

[maksym (maksym)]

I'm having exactly the same bug. I'm also seeing more reports online about this bug.

[Jendrik Seipp (jendrikseipp)]

The issue also happens randomly after no particular action in Precise using up-to-date stock unity packages.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.