Weird tracking artifacts while dragging elements in InDesign

Question

For the last two days, I've been getting this weird tracking artifact when dragging an element on top of a semi-transparant background. 
I can't seem to figure out how to resolve this.  I even de/re-installed InDesign, and then the entire Adobe Suite. 
Im running Lion (10.7.2)  on a MacBook Pro with a 250 GB SSD and 8 gigs of Ram.
Any help or advice would be greatly appreciated.
Screenshot: http://dl.dropbox.com/u/16762916/Slingshot/Pictures/Screen%20Shot%202012-02-03%20at%209.03 .12%20AM.png

Answer 1

These are user-to-user forums. I think once upon a time the links said that clearly, but it certainly is a bit less obvious now, though the "Learning" page description does say users share their knowledge. No harm done and you are not the only one who comes here thinking they are on a direct line to Adobe. Adobe employees, when they appear, have clearly labeled badges.
I'm really sorry you thought I was taking a tone with you. That was most definitiely not my intention. It's extremely difficult to judge meaning and inflection from a written post, as I'm guessing you must know if you also do support this way. The shortcoming in communication was not a blame situation -- I was trying to let you understand where the breakdown was -- I'm trained to understand some words in particuolar contexts here, and it isn't always correct, and I also apparently misunderstood from the beginning that your screen artifacts didn't get left behind, probably because I'm used to seeing ones that do (mostly in CS3) and I had the scroll bug in mind. These things happen, and we need to let each other know when we aren't communicating, and try to get it right as we move forward.
"Secondly.  A brand new macbook pro should be more than capable of running a second display."
OK, this is another case of not quite communicating, I guess. Live Screen Drawing is a LOT more intense video usage than most applications have. It's kind of like trying to watch a movie full screen. That takes a lot more video power than just throwing static images onto two screens. By way of comparison, I have twice the video RAM that's on your system, and probably more processing power, too, and I drive only one monitor, and I STILL don't use Live Screen Drawing because it works so badly. It shouldn't be on by default because practically no computer in the wild can make it run smoothly, but it got set that way because it's a new feature in CS5 and they wanted people to "discover" it. You have no idea how often we have to suggest to users that they turn it off to regain control of their screens.