This update improves overall stability and fixes a number of other minor issues. The issues addressed include: Fixed a problem with incorrect rotation when working with video created by iPhone 3GS Resolved instability when adding multiple beat markers in some languages Corrected an issue where iMovie could become unresponsive after using fine-tuning controls beyond the stabilized portions of a clip The update is recommended for all users of iMovie 09. Apple releases iMovie 8.0.4 today. The update weighs in at 35.2 MB. You can get it through Software Update on your Mac.