I have had 2 major issues with imovie:
1. When Creating a project and dragging the pictures into project the pictures come up differently: This happens only to pictures that I have edited previously in iphoto (Cropped, rotated, enhanced).
Solution 1: Easiest to Open a new project then drag pictures into new project and it seems to work.
Solution 2: On right...R-click on picture...choose open in Iphoto...Change the picture to Revert to original...The recrop etc...and close...wait 5 seconds for the picture to come in again on the right...then drag to the project. I decided on Solution #1 because I had over 150 pictures I had edited.
2. Tried finalizing or sharing to qicktime either error...not enought heap room in heap zone or error in use or parameter list...
Solution trying as we talk: share, export movie, change resolution to Large if want to burn to DVD. Seems 1080 may be the problem....Also make sure you have turned off Time machine or anything that will interrup the save since (like Sleep mode) it usually takes hours. (I cannot find where to reduce the resolution to finalize) so I shared it instead and hopefully the DVD will work (it has before).
Hope his helps someone! 🙂