Could you provide more info about your setup?
My computer: Core 2 Quad Q6600
OCZ 2GB Ram
Wired Network 100Mbit
PS3 Media Server Version: 1.04
Panasonic TH-37PV60(max. 720p)(wired HDMI to PS3)
Onkyo TX-SR702E(Wired optical to PS3)
I stream other movies(720p, with transcode option) perfectly to the PS3 without stuttering, this is the only movie which is stuttering.
So thats why i think it has to do with the framerate(NTSC dvd)
When i play yhis movie on my pc, the framerate is correct)