Just a thought: Are you le

Just a thought:

Are you letting it conform the media clips? Even if you move the clips Premiere will come up with a popup that says something like Locating media. But, I have noticed when I start my projects (newly created or been working on) it goes through a process of conforming media. There have been times that seemed that none of the media was available and then after about 2-3 minutes the media that was in the sequencetimeline that was not availableblanked out becomes available.