I am having the same problem with my imac g5, Lacie 250 gig hard drive running FCE 3.0 with a panasonic GS 300. I have erased and repartitioned my hard drive and same problem…. I have ran my setup for a year and a half, no problems. Now video freezes for a second or two, audio keeps trucking. From the freeze forward there is a audio/video tear. Is it my camera, g5, FCE, or hard drive. I am going to import to imovie and see if it freezes anf then import to final cut. If you figure something out let us know…. Good Luck.