I'm using PDVD17 on my PC:
i5
4gb ram
nVidia GT710 1gb
freshly installed win 7
latest drivers

When I watch videos, the hardware video acceleration doesn't turn on. It is especially seen on wideos that are 3D "side by side" because they become jerky... The hardware acceleration is turned on in PDVD's options...
The hardware acceleration works in other players (I've tested it in Potplayer) so the problem must be in PDVD