I have just found out that

I have just found out that these problems were very common with iMovie3 and the 3.0.1 version I have. Apple had several upgrades available and the last 3.0.3 is supposed to fix these problems. I sure hope so. Unfortunately I purchased this computer and let it sit for over a year before I used it. This mac is not connected to the web and was intended to be soley dedicated to video editing just to avoid these problems. I’ll contact apple for advice…………..I would prefer to get a disc with the upgrades. thanks again!