Could you please start update-manager from the terminal and see if hovering the mouse over the changelog viewer prints an exception? I guess this might be a duplicate of bug #1009859, if it happens to you too.
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Ubuntu Bug Squad volunteer triager http://wiki.ubuntu.com/BugSquad
Could you please start update-manager from the terminal and see if hovering the mouse over the changelog viewer prints an exception? I guess this might be a duplicate of bug #1009859, if it happens to you too. wiki.ubuntu. com/BugSquad
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Ubuntu Bug Squad volunteer triager
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