I have 2 machines with 8.0 amd64 installed - 2-core and 4-core Intel. On both computers video playback pauses for a few seconds when playing a large (e.g. VOB) file using mplayer or vlc. I use KDE4 and nv driver. Any ideas where to look to resolve the issue? For example, should I try different video drivers: nouveau or NVidia beta for amd64?