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I don't know how it suddenly became this but here's what's happening right now:

e.g. I have 2 firefox windows open, so I see 2 small arrows on the left side icon of the unity launcher. Before, when I click on the firefox icon, I see 2 small windows of the firefox so I can choose which one. Now it suddenly stopped working. (super+W still works though). The bug on my system applies to all progams with multiple window instances like nautilus, terminal, etc.

Please help, I don't know what to do. I also have cairo dock, compiz, myunity installed in my 12.04. I tried searching online to no avail.

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I don't really have a good answer to your question, but maybe this could be worth trying: – Tinellus Jun 27 '12 at 14:33
Did this ever worked for you Tim? I'm seeing the same problem right now. – LEOPiC Jul 27 '12 at 16:50
Tim check this out, this worked for me… – LEOPiC Jul 27 '12 at 17:03

When you click on the active icon once the last opened window opens, click on the icon again you will get both windows in parallel for you to choose.

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Srijan, nothing happens when I do what you suggest. Before things went wrong with my unity launcher, everything worked smoothly. – Tim Jun 27 '12 at 21:29

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