Red lines & plaid on cinema display when watching DVDs

I bought a MacBook Pro & cinema display in November. The computer's working perfectly but when I watch DVDs on the cinema display, red lines will occasionally flicker horizontally across the screen while the DVD otherwise continues to play normally. After about 10 seconds of this, the screen stops showing the red-lined DVD footage and shows a plaid patchwork instead. Moving the mouse causes a white vertical line to move through the plaid. Turning off the cinema display and letting it rest for a few seconds returns it to functioning normally. The sound works normally throughout. The plaid is primarily lavender and white in color, neither of which colors are prominent either in the DVD imagery or my desktop.
This only happens when I'm using DVD Player, either in fullscreen or windowed mode, and only on the cinema display, not the MacBook Pro's display. I've used the cinema display for 12+ hours at a time with Final Cut Pro (under 10.5.1), Maya (under Bootcamp, with XP), and Rhino (under Parallels), and have never once had this problem. But if I spend more than an hour watching a DVD, I'll experience it at least once.
I've read about electro-static discharge, but that shouldn't be the cause because I've only connected the display to the computer twice, and both times I followed the connection instructions very carefully. I can't find any mention of this problem on this site, but I wanted to ask if anyone had any ideas before I drag the thing and my CD full of photos into an Apple store for them to look at. I'd be thrilled if anyone can give me miraculous solutions, but I'd also appreciate it if you could even confirm that this is probably just a weird hardware problem that replacing the display would fix and that the fact that it only occurs when I'm using DVD Player is irrelevant.
Thanks.

I also have a 30" ACD and I'm experiencing exactly the same problems as you describe, but not only in DVD Player, but as long as the background is black it's possible to see the red lines here and there on the screen. Very, very annoying and it doesn't give me a professional impression of the monitor I so deeply love.
Is this a hardware problem that can be fixed, or should I ask for a new monitor?
- Chris

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