Hello,
I have got the same problem : some very small accelerations of the video and the sound sometimes.
Video is playing from the HD, not from a CD. I am using Dualview to watch the video on my TV and the sound is sent by the SPDIF output of my soundcard to an external device.
My config : Windows 2000 SP4, Pentium IV 2.54, 1 Go DDRAM, GeForce4 Ti 4200 with the latest drivers, Sound Blaster Live 1024 and the lastest BSPlayer of course