MPEG 2 stutters when played on my Mac

Hey everyone,
I am having a strange problem with MPEG 2 files. Normally I make DVDs to play on DVD players connected to tvs, but for my current project I need to create a DVD which will most likely be played on computers. The MPEG 2 files I've created in Compressor and DVDSP play back with a strange stutter during pan shots. Other shots are ok. Just to check, I burnt the files to a DVD and played them on my tv and there is no stutter. I've played the files through the Apple DVD Player program directly from the DVD, and also through QuickTime Player direct from the hard drive and I get the same stutter in both.
I read on another thread about someone having this problem with MPEG 4 files and they were told to try the VLC player, so I gave this a try as well, and it did work a lot better than QuickTime Player or DVD Player. But I can't rely on that because I doubt that most people I'm going to give the DVD to would have the VLC player. Can anyone suggest any settings for Compressor or DVDSP that will produce stutter-free pans when viewed in either DVD Player or QuickTime Player? My clip is less than 2 mins long. The settings I have used so far are:
Exporting from FCP to Compressor:
MPEG 2 PAL 60 minute two pass VBR, average bit rate 6.6Mbps, Max bit rate 7.8Mbps, Motion Estimation: best, Field dominance: bottom first
MPEG 2 PAL 60 minute One pass, average bit rate 7.8Mbps, Motion Estimation: best, Field dominance: bottom first
Exporting as a movie from FCP and then using DVDSP to encode during 'build/format':
MPEG 2 One pass VBR, bit rate 4.0Mbps, Max bit rate 7.0Mbps, Motion Estimation: better, Field order: auto
Any hints or tips would be gratefully received!
Dual 2GHz G5 2GB RAM   Mac OS X (10.4.6)  

Thanks Heikki. My pans were shot on a DVX100a at 25p, so as I understand it, the footage is already progressive. I have tried compressing as a progressive MPEG 2 but it looks the same in QuickTime and DVD Player no matter what settings I use in the export. It only looks good in VLC Player or if I burn it to DVD and watch it on tv. Non panning shots look fine, it's just during the pans that there is a problem - as if I had some trembling disease while I was panning the camera!

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