Hi! Ive been searching around in a great lot of forums, but I have not yet find the answer I'm looking for. I have got a Canon Legria HF200 (1080i) videocamera and a MacBook late 2009. When I import the video that i have recorded into iMovie (I don't know any other ways - it's AVCHD format) the MacBook warns me that if I'll import in full resolution (1080i) this will might result slow playback on my computer. Why? When i preview the files before I import them the video plays perfectly fine. If I import them to my laptop and then view them they turn out to be played really slow and unclear. Would this be a problem with the way iMovie imports the file, or my hardware? Could it be that my HDD is to slow? This has annoyed me for months, please help!