Weird flickering display?

i am looking at my alum macbook and have everything minimized everything and noticed that the monitor is flickering quickly and looks as if you see a ripple in watter but its going very fast. like it is refreshing but i can see it refreshing. i have apple care. should i send it in to have it looked at? thanks in advance!

I have already checked those and neither are activated.
Also, if there is an animated gif, or something that moves, the entire display is filled with a horizontal line that's the same colour and height as the gif. If I refresh the screen or activate expose, it vanishes, but then comes back pretty soon after,
It's funny because I've had it on most of today (after being shut down all night) and it's been fine. It's just started again this evening. Makes me think something could be overheating perhaps.
Thanks for trying to help anyway.

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You could contact an Apple Store with Genius bar for a diagnostic test to see what
is the actual defect behind these symptoms you've noticed; they can give you an
estimate on costs to repair the device. In several regions (esp US & Canada) the
Genius bar diagnostic testing is a free service...
http://www.apple.com/retail/geniusbar/
Find an Apple Authorized Service Provider
Visit an Apple Retail Store
http://www.apple.com/support/contact/
This is about the best advice a person can offer in this regard, since there appears
to be a hardware defect and there are more than a few parts that could cause it.
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>
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http://picasaweb.google.com/zhiyongsun3/200910WeirdMacProblem?feat=directlink
http://picasaweb.google.com/lh/photo/Dgq3nB0np9peZn6p_lrcJw?feat=directlink
Hi, sorry that I don't know how to post image directly, so you have to click the link to go to the picasa site to see the screen captures.
Am having weird display problem with my Snow Leopard 10.6.1 on Macbook Pro 4,1. It's only in Finder item so far, things are randomly mis-displayed, or wiped out completely. If you see my screen shots you will have a clear idea.
Is this a know problem? I don't even know how to search this problem on the web, or in this forum. I never seen such problem on my iMac with Leopard 10.5.7.
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Weird flickering display?

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