I'm finding random video hits in some of my video clips when playing back. Each time I start up the project it tends to happen in a different video clip in the Timeline. I've found re-connecting the media takes care of it for the time being, but that doesn't keep it from happening again arbitrarily in other clips. Using a Dual 1.25 G4 this time in the 10.3.8 OS. All the footage is stored on an external 250 GB Lacie. Please help.