I recently upgraded to Mavericks (download from app store).

Before this upgrade, I could click on the the notifications UI element at the very top-right of the display; this would cause the whole screen to shift to the left and display a list of notifications:

![enter image description here][1]

Now, after the upgrade, this UI element simply turns blue during the mousedown, and nothing else happens.

Are there any known fixes or workarounds to this?

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I should add I am experiencing a similar but not identical issue with the spotlight UI element:

![enter image description here][2]

When I click on this one, I just get a "bonk" sound and no spotlight search bar.  ***However*** I can use spotlight without problems from finder windows, etc.

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I don't know, but I'm guessing these two issues may be related simply because of their proximity on the screen.

Other taskbar UI elements appear to be working normally.

  [1]: https://i.sstatic.net/LhpsO.png
  [2]: https://i.sstatic.net/zDK38.png