Page 1 of Synchronisation problems

Hi guys, this is going to be a tad long, but bare with me if u can.
I was wondering if some of u are experiencing the same problem as i am.

With the DVD of Shrek (region 2 version Benelux version), the sound seems to be a bit off sync with the picture.
It`s a little hard to notice in the movie, but in the extra featurette "The tech of Shrek", the synchronisation is way off.

I also have the DVD set of Scream (also region 2) and the same problem is noticeable in the first movie. Especially in the scene where Sidney is all alone at home and she`s watching the tv (the news of Casey Beckers` murder is totally off sync).

At first I thought the problem was with my dvd-player, an Aiwa 370.
But I just got a Playstation 2 and the same problems seem to occur with the same movies.

When I tried the movies on my PC with DVD-ROM, the Shrek featurette seemed to be a bit better, but still not perfect.

Has this problem something to do with the NTSC/PAL conversion (in case of the featurette) and just a bad conversion in the "Scream"-case?

Since I`ve had these problems, I seem to notice them with other movies as well. Am I seeing ghosts here?

Lip-sync problems are fairly rare, but they are a right royal pain in the butt, and no mistake.

It shouldn`t be anything to do with NTSC/PAL, it`s often just poor authoring (eg R2 dts soundtrack of 15 Minutes, R1 dts soundtrack of Moulin Rouge) by the studio.

Just played Shrek for the first time on a region 2 Toshiba 220E and have exactly the same porblem. So it must be the DVD itself. I noticed that some of the scenes in the featurettes had worse sync with the animation than in the main film so it must be these that are the problem.

Thanks for the replies...
So I guess the hardware isn`t the problem, but the software is...
Could it be that difficult to delliver a full-working product? :(