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Problem: Updated on 30/07/2012 (no idea what was updated, noticed a lot of updates to Qt), restarted, and was greeted with a broken, painful looking desktop.

Tried $ unity --reset

But system complained - "Window Manager warning: Failed to load theme "Ambiance": Failed to find a valid file for theme Ambiance

enter image description here

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1 Answer 1

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I was able to fix this problem by reinstalling Ambiance with the following command, and restarting the computer.

sudo apt-get install light-themes

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