I had the same problem (random hangups) rendering a 63-minute AVCHD video. I’m using an XP SP2 PC with Intel Core 2 Quad processor, 3GB RAM and Radeon ATI HD 2600 XT 256MB GFX card. The solution isn’t elegant, but it finally solved the problem; I removed the PC side access panel and placed a desk fan there to add extra cooling (which is what Pinnacle suggests). I guess the processor gets really hot during the intensive rendering process. Hopefully, Pinnacle will add a patch to fix this problem.
