Video skipping during normal DVD playback

I have a brand new 20" iMac with SuperDrive. I recently popped in a DVD (straight out of the plastic wrap) and tried to play it. The DVD plays for the most part but every 5 to 20 seconds the video skips/freezes while the audio continues to play without interuption.
I've played this same DVD in my 4 year old PC laptop and works fine, so its not the DVD. What could be wrong with my brand new iMac? Any thoughts?
The whole reason I got this new beaut of a computer is so that I wouldn't have to watch movies on a 12" laptop...
Arggh...

Hi Ben:
I came here to post and then saw yours. I have a similar situation in that I attempted to watch a brand new out of the box DVD on my iMac 20" G5 (revision A). I have recently upgraded to Tiger and iLife 05. I did both upgrades on my iBook G4 also.
So, the video "skips" on the G5. My "skip" is that the audio seems to trail the video and that the characters seem to jerk and drag - you can see the eyes blink and unblink.
But - the same DVD works fine on my iBook as well as the DVD players connected to two different tv sets.
How do we notify Apple of this problem? I can live without watching a DVD on my G5 - but I'm really curious as to what the problem might be and hope to hear from others.
Regards/SudsK

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This may not relate to your issue since you said it also skips occationally, but still worth looking at...
http://www.danslagle.com/mac/iMovie/audio/1001.shtml
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Hi Bilbo_cheshire
Thank you
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******Clicking the Thumbs-Up button is a way to say -Thanks!.******
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