I am a total newcomer to using Blender, so I probably have something not adjusted correctly. Here is my problem. I will be editing videos using the video editor, and all of a sudden, the video will jump to playing 3-4X the normal rate. I am not making changes to the frame rate or anything else. In one instance, I watched a section of video and it was working fine, but then I got up and got someone to come look at it, and when I got back to the computer it was playing faster.
I have yet to discover a way to fix this issue. I will try adjusting frame rates and other items, but it still flies over the video in the preview window at probably somewhere around 100-120 fps.