I need to do some very basic editing for a university presentation. I always used iMovie 09 and never had a problem. I tried using the new iMovie today for the first time and it is unusable. It is extremely slow. If i even press pause during the video it freezes for 5 minutes. The preview window shows the video stuttering (even though when playing the video on any player it is fine). It has become unusable. My macbook pro is a 2.8 GHz Core i7 with 4gig ram. I know it is not a huge amount of ram but I'm trying to edit a 5 minute video in iMovie and never had a problem with the old version. Is this a issue with the new iMovie?