Pixilated bar at bottom of Macbook screen, Pixilated bar at bottom of Macbook screen

I've been having this reoccuring problem with my macbook pro. The problem is that sometimes (no regular pattern noted yet) a pixilated gray pay appears at the bottom of my screen. I was able to take a screen shot of this (see below). This bar is on top of all open applications and the desktop it does respond when i move my mouse under it. The bar is not a defined size (once it took up 2/3 of my screen. I am, however, able to solve this by restarting my computer.
What would be causing this problem, and how can I resolve this issue?
Thanks
Colby
Note: due to image constraints of Apple support communities I was required to upload my image on an extenal site. Please Click This Link.

The status bar is what you are asking about. Adblocker Plus is know to cause this problem.

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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
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Pixilated bar at bottom of Macbook screen, Pixilated bar at bottom of Macbook screen

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