I had a similar problem capturing from my Canon HV-20 HDV tape based video camera.
If I "locked" the HV-20 to "DV" ... I could capture without issues.
If I set the camera to "HDV" ... I would get these green ... blue lines/blocks that would show up via playback and would manifest themselves during recording also. So basically, I could not capture my HD footage. Totally sucked.
(The lines themselves would not show up on the camera's display or if I hooked the camera up via its HDMI to my TV. So it was not the source.)
However ... sometimes ... with HDV set, PD9 would play and record without issues; this is what made it so frustrating. It was basically I kept on trying until it worked. Once I got it to work, I could usually repeat it from that point forward. Turn the camera off though, or remove the cable, reboot the computer, and I was back to square one.
I am hoping it is my firewire cable. It has been forever since I have used this camera and the cable ... I have transferred my footage, so I am okay for now. To go through this again though ... would be a nitemare.
I have only experienced this during capture though. To "Produce" or "Make Disk" or "Edit" ... I have never seen it.
Sorry ... not much of a "solution" I know ... more of a ... "I feel your pain"
Dell Studio 1558 (laptop) * I5-520 * AMD HD 5470 * 4GB RAM - 1066MHz DDR3 * 320GB 7200RPM Hard Drive * Windows 7 Pro 64 bit * BluRay Burner