Macbook freezes and the screen glitches up.

I've had my Macbook since November 2010. It's running the latest OS update. Recently it's been freezing several times a day, first locking up and then a split second later the screen just kind of glitches up. No gray screen or beachball. The mouse continues to work. I just hold down the power button and reboot and it works fine until the next freeze.
I don't think it has anything to do with running too many things at once since it usually just happens when I'm running Chrome, Twitter for Mac and iTunes. There's no real warning before it actually freezes, it just happens all of a sudden.
Here's a link to an image of a picture I took of it after it glitches up so you can get a better idea of what I'm talking about.
http://i.min.us/ibKzVe.jpg
(FYI my wallpaper is Susan Coffey lol.)
I appreciate any help! Thank you!

Hey guys,
I have been having the exact same issue out of nowhere. I am running on a MBP 2010 2.4ghz i5 running Snow Leopard 10.6.5 with NVIDIA GeForce GT 330M. Exact same symptoms- computer freezes, screen gets all garbled but mouse works, have to do a hard reset then computer works fine again until it freezes once more at some random interval. Reset the PRAM and everything as instructed above. Freeze still happened.
Now, I had recently upgraded the RAM to 8gb of Crucial memory. I figured that must be it so I just replaced the 8GB with the stock 4GB i had originally. I did that this morning and havent had a freeze since (though its only been a few hours.)
However, a few minutes ago while working on Final Cut (with the stock 4GB RAM), the canvas started going all crazy flashing red when I would play clips back. Very weird behavior. I googled and found this thread. http://discussions.apple.com/message.jspa?messageID=12826812
Reading thru I discovered that 10.6.5 and 10.6.6 apparently messed up some NVIDIA drivers. I downloaded and installed the program the forum mentioned. Found here: http://www.mylivingdesktop.com/website/html/Techsupt.html
So in summary, I am not sure what is causing it, or if I have permanently fixed it yet- both the RAM and broken NVIDIA drivers seem to be equally plausible.
I have a few questions for the other people on here suffering the same issue.
1) Have you installed any additional RAM recently?
2) What version of Snow Leopard are you running?
3) What graphics card do you have?
4) Does the NVIDIA driver program, fix your issues completely?
Hopefully this will help shed light on the problem,
T

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    10/22/13 9:41:59.000 AM kernel[0]: CoreStorage: fsck_cs has finished for group "3FD474FF-B711-4557-9B01-67EB19C49BDA" with status 0x00
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    10/22/13 9:42:23.639 AM WindowServer[114]:   Display 0x1c80d8d2: MappedDisplay Unit 2; Vendor 0x472 Model 0x235 S/N 592467346 Dimensions 20.51 x 11.54; online enabled, Bounds (0,0)[1920 x 1080], Rotation 0, Resolution 1
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    10/22/13 9:42:26.755 AM com.apple.launchd.peruser.501[148]: (com.apple.gamed) Ignored this key: GroupName
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    10/22/13 9:42:28.048 AM WindowServer[114]: Display 0x1c80d8d2: MappedDisplay Unit 2; ColorProfile { 2, "Acer G245HQL"}; TransferFormula (1.000000, 1.000000, 1.000000)
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    10/22/13 9:42:38.863 AM com.apple.launchd.peruser.501[148]: (com.apple.AddressBook.abd) Throttling respawn: Will start in 9 seconds
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    10/22/13 9:42:42.685 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.714 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.714 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.733 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.733 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.752 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.752 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.771 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.771 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.789 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.789 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.808 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.808 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.827 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.827 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.845 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.845 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
    10/22/13 9:42:42.864 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP1] [value:128.95.120.1]
    10/22/13 9:42:42.864 AM InterCheck[72]: SXLC: Setting [key:SXLDNSIP2] [value:128.95.112.1]
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    10/22/13 9:42:54.715 AM FDERecoveryAgent[82]: Waiting for CoreStorage encryption be activated, will try again in 40 seconds

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