I downloaded Mountain Lion a few weeks ago and ever since, as I'm reading e-mail or anything actually, the screen shifts, like a nervous tick, and during that few seconds it's frozen.  Nothing responds. Can this be corrected?

I downloaded Mountain Lion a few weeks ago.  Almost immediately I noticed that there was an issue.  Every few minutes the screen or page I have open, e-mail, Facebook etc. will start to "jiggle" side to side.  Like a nervous tick. During the few seconds it's doing that nothing else responds, it freezes my mouse etc.  I guess I was hoping it would go away!  Everything else is working just fine, and it never did this until I updated to Mountain Lion.  Can this be fixed?

It is probably some incompatible 3rd party software.
I wrote a little diagnostic program to help show what might be causing these problems. Download EtreCheck from http://www.etresoft.com/download/EtreCheck.zip, run it, and paste the results here.
Disclaimer: Although EtreCheck is free, there are other links on my site that could give me some form of compensation, financial or otherwise.

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