I had the exact same problem.
Disabling all addons and then enabling them one by one, showed torbutton
(1.2.0rc1) to cause problems for me. Disabling this addon solved my
problem. I have not investigated further, so I don't know whether this
is a bug or a feature with torbutton.
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firefox forge
Installing the packages mpg321 and vorbis-tools fixed this bug for me in
Feisty.
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Nautilus Audio Mouseover Preview Does Not Work
https://launchpad.net/bugs/94620
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For my part, the problem only appears when resuming from hibernation.
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artifacts near the end of usplash boot
https://launchpad.net/bugs/66652
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Same behaviour on my HP/Compaq nc6220.
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artifacts near the end of usplash boot
https://launchpad.net/bugs/66652
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