Frequent failures to burn DVDs

I have a new Macbook Pro 13", June 2009 (unibody.) Almost every other DVD+R DL I burn from finder (burning files to a DVD) results in a failure (a "coaster.") This is my first mac, I've only ever used Windows PCs before this and I can't remember the last time I actually had a CD or DVD fail on any PC before this. It hasn't happened to me in many years, but I get them a lot on the Mac.
The question is, is this normal? Or is there something wrong with my drive?
I could certainly go in to visit a Genius and have them check it out, but before I do I wanted to check in here on expectations.
It's a brand new laptop, so I know it's not dirty.
Thanks

I've had these discs for a very long time, so they aren't going back. I'll just bring them to work and/or use them with my external USB burner. They're still find for my other computers.
Odd, I thought Memorex was supposed to be decent. Now I know. You know, you think you're avoiding the garbage and going with a good name brand only to get garbage. The whole point is to avoid media problems in the first place.
Well now I know it's likely the media. For whatever reason the Macbook burner just doesn't like this media.
Awesome, thanks for all of the help. I'll definitely go get some Verbatim (and stick to them.) Good advice on getting something I can return if they don't work.
Thanks again for all of the responses.

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    Like a number of other folks, I had an unexplained failure to burn DVDs and thought something Very Bad had happened to my drive. However, doing some research before buying a new drive (if I had to buy one, might as well get the Latest and Greatest right?) I found there's a lot of really bad media out there. Companies are buying some really cheap junk, slapping their label on it, and putting it on the shelves.
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    Matt Clifton wrote:
    A great tip that works in OS X 10.5.
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  • Error occur when burning DVD

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