Thanks for Your answer,
the same problem is on Apple Discussion:
“when ik use jkl to scrub through tapes, the computer hangs for a minute, this doesnt happen when i use the mouse to move through a tape…
this both happens on files on the internal serial ata as the firewire disk…and olso when i use dv footage…
very annoying
i’m fullly updated and repaired, as wel as trashed…
thanx”
Karel