Thanks for answering, Jerry. The system was set up in July this year, clean install of everything in Snow Leopard. I don´t have anything else installed except FCP Suite, a couple of tools like mpeg streamclip, various SxS drivers and software and Adobe CS5. No additional Quicktime support software like Perian or similar.
The computer is one out of 4 running a substancial project shot in XDCAM HD 422 50mbps,
with approx. 8 TB of material on local discs.
My feeling is that it might be XDCAM codec which is the culprit here, as FCP tends to struggle on all machines with things like thumbnail views of clips, scrolling in the timeline etc.
Could that give you any more ideas?
Regards,
Tore Jonssen