I’ve had this happen but it was so long ago I can’t remember what I did. Have you tried doing one clip at a time? Have you tried doing a clip capture from one of the tapes just as a test? When the computer is “capturing” do you see the video on the computer screen? Just a little test to see if it is a FCP problem or a “system” i.e. the hardware connected to the computer, problem. Try different levels of capture. NOW, CLIP and then BATCH and see where it falls down. Do you capture from more and just DV? Such as a RS-422 for deck control or a Voodoo card for video. I’m sure you have check most, if not all of these. How about trashing Prefs? Hope this helps-