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I tried to drag and drop transmission to my launcher in Ubuntu 12.04, and this is what I got:

enter image description here

As you can see - there is an icon shaped space where an icon ought to be. Transmission is locked to the launcher - but I only know this from right-clicking on the space (which gives me the option to unlock it, as well as start the application minimised or with all downloads paused). Left-clicking on the space does not launch transmission. Why don't I have a launchable icon of Transmission in my launcher?

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closed as too localized by Jorge Castro, Ringtail, James Dec 25 '12 at 3:34

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

I did install for gnome package and same issue was fixed. – Anton May 1 '12 at 17:24
up vote 2 down vote accepted

I think that you can open a terminal and use this command:

unity --replace &

to restart unity without reboot or logout from the session. You can also use the shortcut ALT+F2 with the dash and use the same command.

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Same thing happened to me with Chrome. I rebooted and the icon appeared. Please tell me if this works for you!

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