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I changed Metacity to Compiz. Everything works great.

However, when I use Chromium, as I hold the tab to organize them, the tab can't merge to the original window. So later on, it opens a new window.

So, how can I solve this?

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closed as off-topic by Luis Alvarado Jul 27 '14 at 2:17

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Bug reports and problems specific to development version of Ubuntu should be reported on Launchpad so that developers can see, track and fix these issues." – Luis Alvarado
If this question can be reworded to fit the rules in the help center, please edit the question.

I'm at least glad, from your question, I now realize it's related to Unity2D. I made the change not too long ago and didn't make the connection. – Catskul Dec 10 '12 at 18:52