I'm running Leopard and FCP 6.06 on a Mac Pro 2.8GHz 8-Core Xeon with 8GB memory.
I'm editing 3 min shorts shot on the JVC HM100, which uses the xdcam-ex codec wrapped in Quicktime (1920 50i).
At first there were no problems but since a few days the image has a digital distortion at random points, most often around shorter cuts. It shows the actual frame with distorted by a frame from somewhere earlier in the edit. It occurs on the JVC footage as well as exported Motion projects in the same resolution. The distortion occurs on rendered and unrendered sequences, as well as on sequences that didn't need to render and single layer sequences. The problem doesn't exist on SD sequences, nor (as far as I can tell) after export.
Trying to solve the problem I tried changing the render settings to ProRes, trashed the system preferences and all render files, but nothing seems to help. What options do I have left?