Vlc won't play at normal speed on Intrepid 8.10

[Nigel Henry]

I've got vlc installed on both Ubuntu, and Kubuntu Intrepid 8.10, but it won't 
play DVD's at normal speed.

Vlc plays ok on other distro's on this machine, including Kubuntu Hardy.

When I start Vlc on Intrepid, it plays for about a half second then stops. if 
I move the bar to move further on in the movie, it plays about a half second 
of sound, and video, then stops again. At the bottom of the window there is a 
button to adjust playback speed. If I slow the speed down, the dvd will play 
in slow-mo, without stalling. At the moment I have it set to 0.47%, but if I 
increase the playback speed the movie just comes to a stop.

I've got Kaffeine, and Xine on my Kubuntu Intrepid install, and they play the 
same dvd's ok, and on the Ubuntu Intrepid install, I have Totem, and Ogle 
installed, and no problems with the same dvd's there either. It just seems to 
be a problem with vlc on both Kubuntu, and Ubuntu Intrepid 8.10.

Anyone any suggestions as to what the problem might be?

I've never experienced this before, so any suggestions are most gratefully 
received.

Nigel.